STATE STANDARD
USSR UNION

TECHNICAL FELT
SEMI-COARSE HAIR AND DETAILS
FROM IT FOR MECHANICAL ENGINEERING

TECHNICAL CONDITIONS

GOST 6308-71

USSR STATE COMMITTEE FOR MANAGEMENT
PRODUCT QUALITY AND STANDARDS

Moscow

STATE STANDARD OF THE USSR UNION

Validity from 01.07.72

until 01/01/93

This standard applies to technical semi-coarse wool felt and felt containing chemical fibers and parts made from it for mechanical engineering (oil seals, gaskets, filters).

1. MAIN PARAMETERS AND DIMENSIONS

1.1. Semi-coarse technical felt, depending on its purpose, is divided into types:

felt for oil seals used to retain lubricating oils in friction areas and protect friction areas from water and dust;

felt for gaskets that protect machine parts from abrasion, contamination, shock, shock, and also used for sound absorption.

Felt for gaskets is made in two grades depending on the degree of compaction:

A - density (0.34± 0.02) g/cm 3:

B - density (0.28 ± 0.02) g/cm 3 (for soft pads);

felt for filters used for filtering oils;

1.1.1. The symbol of felt includes its name according to the type of wool: semi-coarse wool, pure wool - P, semi-coarse wool containing chemical fibers - P X; purpose (oil seal - C, gasket - Pr, filter - F), thickness, as well as the designation of this standard.

Semi-coarse pure wool felt 10 mm thick:

for oil seals - felt PS 10 GOST 6308-71;

for gaskets of grade A - felt PPr A10 GOST 6308-71;

for gaskets of grade B - felt PPr B10 GOST 6308-71;

for filters - felt PF10 GOST 6308-71.

Examples symbol semi-coarse felt containing chemical fibers 10 mm thick:

for oil seals - felt P X WITH 10 GOST 6308-71

for gaskets grade A - felt P X P R A 10 GOST 6308-71

for gaskets grade B - felt P X P R B 10 GOST 6308-71

for filters - felt P X F 10 GOST 6308-71.

1.2. Parts for mechanical engineering from semi-coarse felt, depending on the purpose and shape, are made of the following types indicated in the table. .

Table 1

Notes:

1. Symbol of figured parts - F g.

2. A rectangular felt piece with a width of up to 100 mm is called a tape, and a width of more than 100 mm is called a plate.

1.2.1. The symbol for felt parts includes the designation of types of parts and their dimensions in millimeters in the following order:

but for rings - outer and inner diameters, thickness;

for tapes and plates - length, width, thickness;

on disks - diameter, thickness;

for figured parts - after the symbol it is indicated “according to the drawing”.

Examples of symbols

Semi-coarse pure wool seal rings with an outer diameter of 75 mm, an inner diameter of 50 mm, a thickness of 7 mm:

Ring SP-75-50-7 GOST, 6308-71

Semi-coarse-haired gland rings containing chemical fibers with an outer diameter of 50 mm, an inner diameter of 30 mm, a thickness of 7 mm:

Ring SP X -50-30-7 GOST 6308-71

Gasket tapes, brand A, semi-coarse pure wool, 80 mm long, 40 mm wide, 15 mm thick:

Tape P R AP-80-40-15 GOST 6308-71

Tape strips, grade A, semi-coarse wool, containing chemical fibers, 80 mm long, 40 mm wide, 15 mm thick: . 4

Tape P R AP X -80-40-15 GOST 6308-71

Gasket tapes, grade B, semi-coarse pure wool, 80 mm long, 40 mm wide, 15 mm thick:

Tape P R BP-80-40-15 GOST 6308-71

Tape strips, grade B, semi-coarse wool, containing chemical fibers, 70 mm long, 50 mm wide, 10 mm thick:

Tape P R BP X -70-50-10 GOST 6308-71

Semi-coarse pure wool filter plates 300 mm long, 200 mm wide, 5 mm thick:

Plate FP-300-200-5 GOST 6308-71

Semi-coarse-wool filter plates containing chemical fibers 350 mm long, 250 mm wide, 5 thick m m:

FP plate X -350-250-5 GOST 6308-71

Spacer disc, grade A, semi-coarse pure wool, diameter 120 mm, thickness 10 mm:

Disk P R AP X -120-10 GOST 6308-71

Omentum figured semi-coarse-haired pure wool:

Oil seal F G P according to the drawing GOST 6308-71

Curly semi-coarse wool omentum containing chemical fibers:

Oil seal F G P X according to the drawing GOST 6308-71

1.1 - 1.2.1. (Changed edition, Amendment No. 4).

1.3. Nominal dimensions and maximum deviations in thickness of all types of felt must comply with the standards specified in table. .

Table 2

mm

1.4. The dimensions of all types of felt in length and width are established by agreement between the consumer organization and the manufacturer within the limits: length from 0.8 to 5.0 m, width from 0.7 to 2.0 m.

1.5. Felt parts in shape and size must correspond to the drawings of the consumer organization, agreed upon with the manufacturer.

Maximum deviations from the nominal dimensions of felt rings and disks must correspond to those indicated in the table. , a felt tapes, plates and figured parts - in table. .

1.6. At the request of the consumer, for particularly precise parts of stuffing box rings and disks with sizes from 10 to 25 mm, the tolerance on the outer diameter is set in mm.

Table 3

mm

Table 4

mm

Note. Maximum deviations for tapes and plates with a length and width of over 400 mm are set to ±1.0 mm for every 100 mm of additional length and width in excess of 400 mm.

1.7. The nominal dimensions and maximum deviations in the thickness of felt parts (oil seals, gaskets and filters) must comply with the standards specified in table. .

Table 5

mm

2. TECHNICAL REQUIREMENTS

2.1. Technical semi-coarse wool felt in terms of the composition of fibers in the mixture must correspond to that indicated in the table. .

Table 6

The mass fraction of non-wool fibers in the mixture is allowed due to their presence in tow, waste products and recovered wool or due to partial replacement of these components with non-wool fibers. The mass fraction of non-wool fibers in the finished felt should not exceed the standards specified in the table. .

It is allowed to replace up to 1% of sheep's natural semi-coarse varietal wool and up to 9% of sheep's fur semi-fine and semi-coarse wool and combed semi-coarse tow with a cross-bred klunker of a hot wash.

(Changed edition, Amendment No. 3, 4).

2.2. The color of the felt should be natural; Variation in shades is allowed due to the use of dyed reconstituted wool and combed semi-coarse tow.

2.3. In terms of physical, mechanical and chemical parameters, technical semi-coarse wool felt must comply with the standards specified in Table. .

2.4. The density of felt parts, depending on their thickness and outer diameter or length, must comply with the standards specified in table. .

2.4.1. Deviations in the density of parts are allowed: minus - 0.01 g/cm 3 for parts made of semi-coarse wool felt, 0.02 g/cm 3 - for parts made of semi-coarse wool felt containing chemical fibers, plus - within the limits of the felt indicator, taking into account the tolerance by volumetric weight of felt (see table).

2.3 - 2.4.1. (Changed edition, Amendment No. 4).

2.4.2. The density of the rings indicated in the table. , refers to rings with a side width of at least 7 mm.

The density of rings with a side width of less than 7 mm up to and including 2.5 mm is established by agreement between the consumer organization and the manufacturer.

2.5. The density of felt parts for filters of all sizes must comply with the standards specified in table. for the corresponding felts.

2.6. Felt rings with outer diameter up to 60 mm inclusive. They are made entirely cut, over 60 mm - sewn from strip, except for those rings that are technically impossible to sew due to the large difference in the ratio between the width of the side and the thickness of the ring. Such rings are made from solid cuts.

At the request of the consumer, it is allowed to produce solid-cut rings with an outer diameter of over 60 mm.

2.7. Felt rings sewn from strip must meet the following requirements:

with an outer diameter of the ring up to 400 mm inclusive. one seam is allowed, more than 400 mm - two seams;

the joint line at the stitching site should be inclined, and the cut angle (a) should be 20 - 30° (see drawing);

Table 7

Notes:

1. Density indicators, mass fraction of free sulfuric acid, vegetable impurities, mineral impurities and non-wool fibers refer to felt with a normalized moisture content of 13%.

2. The actual moisture content of the felt should not exceed the normal value.

Table 8

Stitching is carried out in at least two rows with linen threads in accordance with GOST 14961-85 of the following linear densities:

105tex´ 5, 130tex´ 4, 105tex´ 6, 130tex´ 5 or extra-strong cotton threads in accordance with GOST 6309-80 of the following numbers: 0 (with the number of additions nine), 00 (with the number of additions twelve), 1 (with the number of additions nine), 10 (with the number of additions six);

extra-strong cotton threads in accordance with GOST 6309-80 of the following numbers: 0 (with the number of additions nine), 00 (with the number of additions twelve), 1 (with the number of additions nine), 10 (with the number of additions six).

The linear density of the threads is selected depending on the width of the bead and the thickness of the ring.

With a border width of 10 mm or more, the line closest to the inner edge of the border should be at least 3 mm away from it. If the border width is less than 10 mm, it is permissible to sew the rings in one row with the stitching positioned at an equal distance from the edges of the border;

when sewing rings from strips up to 10 mm thick, the stitching pitch should be no more than 6 mm, when the strip thickness is more than 10 mm - no more than 10 mm;

the cut planes of the joint must fit tightly to one another and must not be displaced;

at the junction, the thickness of the ring must be within the limits of the norms and maximum deviations specified in the table. ;

at the junction, the elasticity of the ring should not differ noticeably from the elasticity of the ring in other areas;

the bulk of the fibers in the stitched ring should be directed along the circumference of the ring. By agreement with the consumer, it is possible to manufacture rings with transverse fibers.

(Changed edition, Amendment No. 4).

2.8. Felt and parts made from it should not show signs of delamination and should be resistant to separation into layers.

2.9. Gluing felt and parts made from it is not allowed.

2.10. The surface of the parts must be clean, with lint evenly removed, without scars. Lint may be present in gasket parts.

2.11. Parts must not have tears, torn areas, bevels or other mechanical damage.

3. ACCEPTANCE RULES AND TEST METHODS

3.1. Acceptance rules and test methods - according to GOST 314-72.

3.2. Acceptance of felt by quantity is carried out according to the standard mass.

Conditioned mass ( T To) in kilograms is calculated using the formula

,

Wherem f - actual weight of felt, kg;

W n - normalized moisture content of felt, %;

W f - actual moisture content of felt, %.

The calculation is made with an error of up to 0.1 kg.

Sec. .(Changed edition, Amendment No. 1).

4. PACKAGING, LABELING, TRANSPORTATION AND STORAGE

4.1. The felt cavities are tightly rolled into a roll weighing no more than 70 kg and tied in two places with rope GOST 1868-88. When the length of the felt cavity is up to 1 m, tying with a rope in one place is allowed.

Tied rolls of felt are packed in packaging fabric in accordance with GOST 5530-81, fabric made of chemical fibers in accordance with normative and technical documentation or non-woven container fabric in accordance with GOST 14253-83 and other normative and technical documentation. The rolls are sewn up manually with twine in accordance with GOST 17308-88. The stitch length should be no more than (40 ± 10) mm.

During transportation by car By agreement with the consumer, tied rolls of felt may not be packaged.

4.2. Felt parts are packed in boxes according to GOST 10350-81or bags made of packaging fabric provided for in paragraph. .

The weight of each box or bag with felt parts should not exceed 50 kg.

When packing felt parts of different sizes into one box or bag, parts of the same size must be tied with twine into bundles. Each package must have a label attached to it indicating the details in accordance with clause.

4.1, 4.2. (Changed edition, Amendment No. 2, 4).

4.3. Transport marking - by GOST 14192-77indicating the manipulation sign “Afraid of dampness.”

Additionally, each package contains information about the packaged products:

name of the manufacturer and its trademark;

name of felt or felt parts;

felt thickness or dimensions of felt parts;

the mass of felt at normalized and actual humidity or the number of felt parts;

quality control stamp;

date of manufacture;

designation of this standard.

(Changed edition, Amendment No. 2).

4.4. Each shipped batch of felt and felt parts must be accompanied by technical documentation certifying product compliance with the requirements of this standard and including:

a) name of the manufacturer;

b) product name by type of wool and purpose;

c) results of product inspection and testing;

d) designation of this standard.

4.4a. Felt and felt parts are transported by all types of transport in covered vehicles and universal containers in accordance with the rules for the transportation of goods in force for this type of transport.

By railway These products are transported in small shipments and wagonloads or in universal containers.

When transporting felt parts in transport packages, they must be formed in accordance with GOST 26663-85.

When transporting felt to the Far North and hard-to-reach areas, the tied rolls must be covered with two layers of investment fabric or non-woven container fabric and tied with rope, and the felt parts must be packed in boxes in accordance with GOST 10350-81.

(Changed edition, Amendment No. 4).

4.5. Felt and felt parts should be stored in a dry, ventilated area. The height of the stack when laying felt should not exceed 2 m.

For air access, the base of the stack must be at least 0.2 m above the floor level of the room.

Felt parts should be stored in boxes or on racks to protect them from deformation.

4.6. Felt and felt parts must be treated with an anti-moth preparation at least once every 5 months.

5. MANUFACTURER WARRANTY

5.1. Felt and felt parts must be accepted by the technical control of the manufacturer. The manufacturer must ensure that the quality of felt and felt parts meets the requirements of this standard.

INFORMATION DATA

1. DEVELOPED AND INTRODUCED by the USSR Ministry of Light Industry

DEVELOPERS:

A. I. Zhirnova, 3. S. Pervukhina, E. M. Kudinova, N. V. Polovinkina

2. APPROVED AND ENTERED INTO EFFECT by Resolution of the State Committee of Standards of the Council of Ministers of the USSR dated August 18, 1971 No. 1453

3. Inspection frequency - 5 years

4. INSTEAD GOST 6308-61

5. REFERENCE REGULATIVE AND TECHNICAL DOCUMENTS

• Minimum order quantity -1 roll (per roll from 30 to 35 kg).
• You can get advice by calling the sales department: +7 (83159) 689-13 And +7 (83159) 689-42 from Monday to Thursday from 8:00 to 17:00 and on Friday from 8:00 to 16:00 Moscow time. Lunch break from 12:00 to 12:40.
• Please send written applications to e-mail: [email protected] .

Delivery conditions

• No later than 20 days after receiving a written application and advance payment in the amount of 100% of the cost of the goods.
• For systematic deliveries no later than 20 days after receipt of a written application.

Calculations

• Transfer of advance payment of 100% of the cost of the goods to the supplier’s bank account.
• For systematic deliveries, transfer 100% of the cost of the goods to the supplier’s bank account after transfer of the goods to the buyer.
• Letter of Credit.
• Cash.

Delivery

• By car.
• By rail.
• Receipt from the supplier (product selection).
• Russian Post.

Shipment

• Pickup from warehouses finished products Bor felt factory.
• Baggage from Gorky-Moskovsky station to the destination station.
• Through transport company at the buyer’s choice (“Attenta”, “Autotrading”, “PEC”, “Zheldorekspeditsiya”, “ Business Line", "Ratek", "RAIL-Continent", etc.).
  By Supplier's road transport to Moscow.
• 5-ton container with st. Mokhovye Gory State Railway to the destination station. The norm for loading felt into a 5-ton container is 1500 kg.
• 20-ton container with st. Kostariha State Railway to the destination station. The norm for loading felt into a 20-ton container is 5000 kg.

STATE STANDARD

USSR UNION

TECHNICAL CONDITIONS

GOST 6308-71

Official publication

USSR STATE COMMITTEE FOR PRODUCT QUALITY MANAGEMENT AND STANDARDS

M. TEXTILES AND LEATHER MATERIALS AND PRODUCTS*

CHEMICAL FIBERS

Group M15

to GOST 6308-71 Felt technically! semi-coarse wool and parts made from it for mechanical engineering. Specifications

(Reprint May 1990)

UDC 677.63.066: 006.334 Group M15

STATE STANDARD OF THE USSR UNION

TECHNICAL SEMI-COARSE WOOL FELT AND PARTS FROM IT FOR MECHANICAL ENGINEERING

Specifications

Technical half-coarse wool felt and machinery parts from it. Specifications

OKU 81 6121, OKP 61 6320

Valid from 01.07.72 to 01.Q1.73

This standard applies to technical wool felt, pure wool felt and felt containing chemical fibers and parts made from it for mechanical engineering (oil seals, gaskets, filters).

1. MAIN PARAMETERS AND DIMENSIONS

1.1. Semi-coarse technical felt, depending on its purpose, is divided into types:

felt for oil seals used to retain lubricating oils in friction areas and protect friction areas from water and dust;

felt for gaskets that protect machine parts from abrasion, contamination, shock, shock, and also used for sound absorption.

Felt for gaskets is made in two grades depending on the degree of compaction;

A - density (0.34+0.02) g/cm 3 ;

B - density (0.28±0.02) g/cm 3 (for soft pads);

felt for filters used for filtering oils;

Official publication Reproduction prohibited

© Standards Publishing House, 1971

© Standards Publishing House, 1990 Reprint with stamps

].1J. The symbol of felt includes its name according to the type of wool: semi-coarse wool, pure wool -17, semi-coarse wool containing chemical fibers - L x; purpose* (oil seal - C, gasket - Pr, filter - F), thickness, as well as the designation of this standard.

Examples of symbols for semi-coarse pure wool felt 10 mm thick:

for oil seals - felt PS 10 GOST 6308-71; for gaskets of grade A - felt PPr A10 GOST 6308-71; for gaskets of grade B - felt PPr B10 GOST 6308-71; for filters - felt PF10 GOST 6308-71.

Examples of symbols for semi-coarse felt containing chemical fibers 10 mm thick:

for seals - felt L x S 10 GOST 6308-71 for gaskets grade A - felt L x PrA 10 GOST 6308-71 for gaskets grade B - felt 17 X P R B 10 GOST 6308-71 for filters - felt P X F 10 GOST 6308-71.

1.2. Parts for mechanical engineering from semi-coarse felt, depending on the purpose and shape, are made of the following types indicated in the table. 1.

Table 1

the name of detail

Semi-coarse-wool ring-gland, pure wool. Semi-coarse-wool ring-gland containing chemical fibers.

Ring-spacer brand A semi-coarse pure wool

Ring-spacer, grade A, semi-coarse-wool, containing chemical fibers. Ring-filter, semi-coarse-wool, pure wool.

Semi-coarse wool filter ring containing chemical fibers

Semi-coarse-wool, pure-wool tape

Semi-coarse wool seal tape containing chemical fibers

Tape-laying grade A semi-coarse pure wool

Tape-laying grade B, semi-coarse, pure wool

Tape-laying grade A, semi-coarse wool with

Semi-coarse pure wool filter tape

Ring SP Ring SP %

Ring PrAP

Ring P R AP X

FP ring

Ring FYA X

SL X tape

Tape L R AL

PrBP tape

Tape Y R AL*

Tape Ya R BP X

Continuation of Table 1

the name of detail

Symbol for the type of part

Semi-coarse wool filter tape containing chemical fibers

Plate-oil seal, semi-coarse, pure wool

Semi-coarse-wool plate containing chemical fibers

Plate-laying grade A semi-coarse pure wool

Plate-laying grade B, semi-coarse, pure wool

Plate-gasket, grade A, semi-coarse-wool, containing chemical fibers. Plate-gasket, grade B, semi-coarse-wool, containing chemical fibers. Plate-filter, semi-coarse, pure wool.

Semi-coarse wool filter plate containing chemical fibers

Disc-oil seal, semi-coarse-wool, pure wool Disc-oil seal, semi-coarse-wool, containing chemical fibers

Disc-spacer brand A semi-coarse pure wool

Disc-spacer, grade A, semi-coarse-wool, containing chemical fibers. Disc-filter, semi-coarse-wool, pure wool. Disc-filter, semi-coarse-wool, containing chemical fibers.

Seal figured, semi-coarse, pure wool

Shaped semi-coarse wool seal containing chemical fibers

Gasket brand A, figured, semi-coarse, pure wool

Gasket brand B, figured, semi-coarse, pure wool

Gasket, grade A, figured, semi-coarse wool, containing chemical fibers. Gasket, grade B, figured, semi-coarse, containing chemical fibers. Filter, figured, blue, coarse, pure wool.

Curly semi-coarse wool filter containing chemical fibers

FP X tape

SP plate

SP X plate

PrAP plate

Plate /7 R BP

Plate PrAP x

Plate P R BP X

FP plate

FP X plate

Disk SP Disk SP X

PrAP disk

Disk PrAP x

FP disk FP disk X

Oil seal F g P

Oil seal F G P X

Gasket AF G R

Gasket BF T P

Gasket AF G P X Gasket BF G P X Filter F g P Filter F G P X

Notes:

1. Symbol of figured parts - Fg.

2. A rectangular felt piece with a width of up to 100 mm is called a tape, and a width of more than 100 mm is called a plate.

1.2.1. The symbol for felt parts includes the

the meaning of the types of parts and their sizes in millimeters in the following order:

along the rings - outer and inner diameters, thickness;

for tapes and plates - length, width, thickness;

on disks - diameter, thickness;

for figured parts - after the symbol it is indicated “according to the drawing”.

Examples of symbols

Semi-coarse pure wool seal rings with an outer diameter of 75 mm, an inner diameter of 50 mm, a thickness of 7 mm:

Ring SP-75-50-7 GOST 6308-71

Semi-coarse-haired gland rings containing chemical fibers with an outer diameter of 50 mm, an inner diameter of 30 mm, a thickness of 7 mm:

Ring SP x -50-30-7 GOST 6308-71

Gasket tapes, brand A, semi-coarse pure wool, 80 mm long, 40 mm wide, 15 mm thick:

Tape Ya R AP-80-40-15 GOST 6308-71

Tape strips, grade A, semi-coarse wool, containing chemical fibers, 80 mm long, 40 mm wide, 15 mm thick:

Tape Ya r AP x -80-40-16 GOST 6308-71

Gasket tapes, grade B, semi-coarse pure wool, 80 mm long, 40 mm wide, 15 mm thick:

Tape Ya R BP-80-40-15 GOST 6308-71

Tape strips, grade B, semi-coarse wool, containing chemical fibers, 70 mm long, 50 mm wide, 10 mm thick:

Tape Ya R BP k -70-50-10 GOST 6308-71

Semi-coarse pure wool filter plates 300 mm long, 200 mm wide, 5 mm thick:

Plate FP-300-200-5 GOST 6308-71

Semi-coarse wool filter plates containing chemical fibers 350 mm long, 250 mm wide, 5 mm thick:

FP plate x -350-250-5 GOST 6308-71

Disc-spacers, grade A, semi-coarse pure wool, diameter 120 mm, thickness 10 mm:

Disk Y R AP x -120-10 GOST 6308-71

Shaped semi-coarse wool, pure wool oil seal: Oil seal F g P according to drawing GOST 6308-71

Curly semi-coarse wool omentum containing chemical fibers:

Oil seal F g P x according to the drawing GOST 6308-71

1.1-1.2.1. (Changed edition, Amendment No. 4).

1.3. Nominal dimensions and maximum deviations in thickness of all types of felt must comply with the standards specified in table. 2.

Table 2 mm

1.4. The dimensions of all types of felt in length and width are established by agreement between the consumer organization and the manufacturer within the limits: length from 0.8 to 5.0 m, width - from 0.7 to 2.0 m.

1.5. Felt parts in shape and size must correspond to the drawings of the consumer organization, agreed upon with the manufacturer.

Maximum deviations from the nominal dimensions of felt rings and disks must correspond to those indicated in the table. 3, and felt tapes, plates and figured parts - in table. 4.

1.6. At the request of the consumer, for particularly precise parts of stuffing box rings and disks with sizes from 10 to 25 mm, tolerance

outer diameter is set!!’,! mm.

Table 4

Note. Maximum deviations for tapes and plugs with a length and width exceeding ±1.0 mm for every 100 mm of additional length and width exceeding 400 mm

400 mm are installed

1.7. The nominal dimensions and maximum deviations in the thickness of felt parts (oil seals, gaskets and filters) must comply with the standards specified in table. 5.

2. TECHNICAL REQUIREMENTS

2.1. Technical semi-coarse wool felt in terms of the composition of fibers in the mixture must correspond to that indicated in the table. 6.

Table 6

The mass fraction of non-wool fibers in the mixture is allowed due to their presence in tow, waste products and recovered wool or due to partial replacement of these components with non-wool fibers. The mass fraction of wool fibers in the finished felt should not exceed the standards specified in the table. 7.

It is allowed to replace up to 1% of sheep's natural semi-lip varietal wool and up to 9% of sheep's fur semi-fine and semi-coarse wool and combed semi-coarse tow with a hot-wash crossbred klunker.

(Changed edition" Amendment No. 3" 4).

2.2. The color of the felt should be natural; Different shades are allowed due to the use of dyed reconstituted wool and combed semi-coarse tow.

2.3. In terms of physical, mechanical and chemical parameters, technical semi-coarse wool felt must comply with the standards specified in Table. 7.

2.4. The density of felt parts, depending on their thickness and outer diameter or length, must comply with the standards specified in table. 8.

2.4.1. Deviations in the density of parts are allowed: minus - 0.01 g/cm 3 for parts made of semi-coarse wool felt, 0.02 g/cm 3 - for parts made of semi-coarse wool felt containing chemical fibers, plus - within the limits of the felt indicator, taking into account the tolerance by volumetric weight of felt (see Table 7).

2.3-2.4.1. (Changed edition, Amendment No. 4).

2.4.2. The density of the rings indicated in the table. 8 refers to rings with a side width of at least 7 mm.

The density of tracks with a side width of less than 7 mm up to and including 2.5 mm is established by agreement between the consumer organization and the manufacturer.

2.5. The density of felt parts for filters of all sizes must comply with the standards specified in table. 7 for matching felts.

2.6. Felt rings with outer diameter up to 60 mm inclusive. They are made entirely cut, over 60 mm - sewn from strip, except for those rings that are technically impossible to sew due to the large difference in the ratio between the width of the side and the thickness of the ring. Such rings are made from solid cuts.

At the request of the consumer, it is allowed to produce solid-cut rings with an outer diameter of over 60 mm.

2.7. Felt rings sewn from strip must meet the following requirements:

with an outer diameter of the ring up to 400 mm inclusive. one seam is allowed, more than 400 mm - two seams;

the joint line at the stitching site should be inclined, and the cut angle (a) should be 20-30° (see drawing);

Stitching is carried out in at least two rows with linen threads in accordance with GOST 14961-85 of the following linear densities:

Notes:

1, Density indicators, mass fraction of free sulfuric acid, vegetable impurities, mineral impurities and non-wool fibers refer to felt with a normalized moisture content of 13%.

2. The actual moisture content of the felt should not exceed the normal value,

GOST 6308-71

1 O GOST 6308-71

105texX5, 130texX4, YuBtexXb, 130texX5 or extra-strong cotton threads in accordance with GOST 6309-80 of the following numbers: 0 (with the number of additions nine), 00 (with the number of additions twelve), 1 (with the number of additions nine), 10 (with the number of additions six );

extra strong cotton threads according to GOST 6309-80 of the following numbers: 0 (with nine folds), 00

(with the number of additions twelve), 1 (with the number of additions nine), 10 (with the number of additions six).

The linear density of the threads is selected depending on the width of the bead and the thickness of the ring.

With a border width of 10 mm or more, the line closest to the inner edge of the border should be at least 3 mm away from it. If the border width is less than 10 mm, it is permissible to sew the rings in one row with the stitching positioned at an equal distance from the edges of the border;

when sewing rings from strips up to 10 mm thick, the stitching pitch should be no more than 6 mm, when the strip thickness is more than 10 mm - no more than 10 mm;

the cut planes of the joint must fit tightly to one another and must not be displaced;

at the junction, the thickness of the ring must be within the limits of the norms and maximum deviations specified in the table. 5;

at the junction, the elasticity of the ring should not differ noticeably from the elasticity of the ring in other areas;

the bulk of the fibers in the stitched ring should be directed along the circumference of the ring. By agreement with the consumer, it is possible to manufacture rings with transverse fibers.

(Changed edition, Amendment No. 4).

2.8. Felt and parts made from it should not show signs of delamination and should be resistant to separation into layers.

2.9. Gluing felt and parts made from it is not allowed.

2.10. The surface of the parts must be clean, with lint evenly removed, without scars. Lint may be present in gasket parts.

2.11. Parts must not have tears, torn areas, bevels or other mechanical damage.

3. ACCEPTANCE RULES AND TESTING METHODS

3.1. Acceptance rules and test methods - according to GOST 314-72,

3.2. Acceptance of felt by quantity is carried out according to the standard mass.

The standard weight (tk) in kilograms is calculated using the formula

where Shf is the actual mass of felt, kg;

W n - normalized moisture content of felt, %;

W$ is the actual moisture content of the felt, %.

The calculation is made with an error of up to 0.1 kg. Sec. 3. (Changed edition, Amendment No. 1).

4. PACKAGING, LABELING, TRANSPORTATION AND STORAGE

4.1. The felt cavities are tightly rolled into a roll weighing no more than 70 kg and tied in two places with rope in accordance with GOST 1868-88. When the length of the felt cavity is up to 1 m, tying with a rope in one place is allowed.

Tied rolls of felt are packed in packaging fabric in accordance with GOST 5530-81, fabric made of chemical fibers in accordance with normative and technical documentation or non-woven container fabric in accordance with GOST 14253-83 and other normative and technical documentation. The rolls are sewn up manually with twine in accordance with GOST 17308-88. The stitch length should be no more than (40±10) mm.

When transporting by road, by agreement with the consumer, tied rolls of felt may not be packaged.

4.2. Felt parts are packed in boxes in accordance with GOST 10350-81 or bags made of packaging fabric specified in clause 4.1.

The weight of each box or bag with felt parts should not exceed 50 kg.

When packing felt parts of different sizes into one box or bag, parts of the same size must be tied with twine into bundles. Each package must have a label attached to it indicating the details in accordance with clause 4.3.

4.1, 4.2. (Changed edition, Amendment No. 2, 4).

4.3. Transport marking - in accordance with GOST 14192-77 indicating the handling sign “Afraid of dampness”.

Additionally, each package contains information about the packaged products:

name of the manufacturer and its trademark;

name of felt or felt parts;

felt thickness or dimensions of felt parts;

the mass of felt at normalized and actual humidity or the number of felt parts;

quality control stamp;

date of manufacture;

designation of this standard.

(Changed edition, Amendment No. 2).

4.4. Each shipment of felt and felt parts must be accompanied by technical documentation certifying product compliance with the requirements of this standard and including:

a) name of the manufacturer;

b) name of the product by type of wool and purpose;

c) results of product inspection and testing;

d) designation of this standard.

4.4a. Felt and felt parts are transported by all types of transport in covered vehicles and universal containers in accordance with the rules for the transportation of goods in force for this type of transport.

By rail, these products are transported in small shipments and wagonloads or in universal containers.

When transporting felt parts in transport packages, they must be formed in accordance with GOST 26663-85.

When transporting felt to the Far North and hard-to-reach areas, the tied rolls must be covered with two layers of investment fabric or non-woven container fabric and tied with rope, and the felt parts must be packed in boxes in accordance with GOST 10350-81.

(Changed edition, Amendment No. 4).

4.5. Felt and felt parts should be stored in a dry, ventilated area. The height of the stack when laying felt should not exceed 2 m.

For air access, the base of the stack must be at least 0.2 m above the floor level of the room.

Felt parts should be stored in boxes or on racks to protect them from deformation.

4.6. Felt and felt parts must be treated with an anti-moth preparation at least once every 5 months.

5. MANUFACTURER WARRANTY

5.1. Felt and felt parts must be accepted by the technical control of the manufacturer. The manufacturer must ensure that the quality of felt and felt parts meets the requirements of this standard.

INFORMATION DATA

1. DEVELOPED AND INTRODUCED by the Ministry light industry USSR

DEVELOPERS:

A. I. Zhirnova, 3. S. Pervukhina, E. M. Kudinova, N. V. Polovin-

2. APPROVED AND ENTERED INTO EFFECT by Resolution of the State Committee of Standards of the Council of Ministers of the USSR of August 13, 1971 N° 1453

3. Inspection frequency - 5 years

4. INSTEAD GOST 6308-61

5. REFERENCE REGULATIVE AND TECHNICAL DOCUMENTS

6. Validity period extended until July 1, 1993 by Decree of the USSR State Committee for Standardization dated December 24, 1987 No. 5003

7. REISSUE (May 1990) with Amendments No. 1, 2, 3, 4, approved in September 1978, March 1983, August 1985, December 1987 (IUS 8-78, 6-83 , 11-85, 4-88)

Editor M E Iskandaryach Technical editor L V Snitsarchuk Proofreader G. I. Chuiko

Delivered to embankment 05 06 90 Preparing for oven. 10 08.90 1.0 uel p. d I,® uel cr -ott 0.98 academic ed. l.

Circulation 25000 Price 20 kopecks

Order "Badge of Honor" Publishing house of standards, 123557, Moscow, GSP,

Novoiresnensky lane, 3

Vilnius Printing House Standards Publishing House, Daryaus i Gireno str., 39 Zak ​​943.

This material is currently used in a large number of different industries. Most often it is praised for the fact that the weight of the product is very small and at the same time, it has excellent thermal insulation. In addition, it can be used as a filter or cushioning material.

Felt according to GOST

Like many other industrial products, the production of this material has established a standard regulating the manufacturing process, technical requirements to the product, its properties, characteristics, labeling, packaging, etc. It is worth noting that there are several GOST standards for technical felt. This is very important, since there are several types of felt, each of which has its own GOST and its own production process.

1. There is fine-wool felt - GOST 288-72.
2. There is technical semi-coarse wool felt - GOST 6308-71.
3. There is also technical fine-wool felt, which is used in electrical equipment - GOST 11025-78.
4. Coarse wool felt - GOST - 6418-81.
5. The last type of felt is yurt. Its GOST is 16221-79.

Felt production

Felt is a material that can be made by felting from several of the following materials:

• production is possible from 100% animal wool;
• can be made from plant fibers;
• can also be used for production;

If we talk about the production of natural technical felt, it can also be made from coarse-wool, fine-wool or semi-coarse-wool fibers. Structure of this product- scaly. Due to the presence of such a structure, during the process of felting this material, the scales interlock with each other, resulting in the formation of a very dense monolithic fabric. Most often, 100% sheep wool is used to produce natural technical felt. However, in some cases, rabbit or goat wool is also used. The product that is obtained by replacing the original wool is called fert and is characterized by the fact that it is softer.

Use of felt in transport

One of the many uses of this product is to insulate a vehicle or completely insulate it. In addition to this characteristic, it is also capable of creating sound insulation in the car and reducing any vibration. Since this material is most often made from natural sheep wool, at high temperatures it will not emit any harmful fumes into the atmosphere. The maximum temperature that technical felt can withstand is about 200 degrees Celsius. Plus, in addition to all these parameters, felt is also capable of protecting vehicle from moisture.

Using felt in a residential area

This one is also perfect for use in residential buildings. There are several reasons for this. The first reason for the widespread use of this product is that it is considered completely environmentally friendly and harmless to human health. The second reason is to provide excellent protection of the room from drafts and cold. It can be used as insulating material, laying it in the cracks between windows or doors. The third reason for the widespread use of technical felt, therefore, is that this material is an excellent insulator. interior space from external odors. Also, the use of this material will provide decent protection against mold and dampness in the room.

However, these applications are only a small part of the vast number in which it is also used. It is used quite a lot in the construction industry, in the production of furniture, as well as in the creation musical instruments. This a large number of areas of application of the same material is explained by the fact that during the creation process it is possible to give it various characteristics that are required in a particular field of industry.

Application of felt by type

Coarse wool felt is used in places where the load and speeds are not too high. This type of felt is used in places where the technical requirements are not too high. It has also found a place in foundation construction as bitumen-impregnated spacers.

There is a type of fine-wool felt used in dentures. In prostheses such as TU 803-54, this material serves as a gasket, as well as as parts of the prostheses themselves. Most often, it is used to produce hands and toes. The thickness of technical felt is 20 mm, 40 or 50. The composition of this material itself is 85% and the remaining 15 is combed tow.

Semi-coarse wool material is used in more loaded areas, and is also often used as a raw material for the production of small-sized but very durable parts.

Fine-wool felt has found its application in instrument making, in the most critical places. According to its technical parameters this type The material can be used to produce parts such as oil seals, gaskets, filters, wicks.