Technical felt: GOST, characteristics, types and reviews. Felt technical coarse wool and details from it for mechanical engineering

^5#"" Official edition

USSR STATE COMMITTEE ON STANDARDS Moscow

UDC "77.076.34: 006.354 Group Ml 5

STATE STANDARD OF THE UNION OF THE SSR

ROUGH-WOOL TECHNICAL FELT AND PARTS FROM IT FOR ENGINEERING Specifications

technical coarse woo! felt and machinery parts from it

GOST 6418-67

This standard applies to technically "coarse-wool felt and parts from it for mechanical engineering (oil seals, gaskets, filters), as well as to felt used as an insulating material.

term of action extended

1. MAIN PARAMETERS AND DIMENSIONS

1.1. Technical coarse wool felt, depending on the purpose, is divided into types:

GS - felt for oil seals used to retain lubricating oils in friction points and protect friction points from water ingress to dust;

GPR - felt for gaskets that protect machine parts from abrasion, pollution, shock, shock, and are also used for sound absorption.

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

A - with a density of (0.32 ± 0.02) g / cm 3;

B - with a density of (0.26 ± 0.02) g / cm 1 (for soft pads); GF - felt for filters used to filter oils:

Reissue (October 1986) with Amendment M I approved in August 1985 (NUS II -85).

GI - felt for insulation, used as a heat and sound insulating material.

1.2. The dimensions of the felt cavity are set in agreement with the consumer:

in length - from 1.0 to 5.0 m;

in width - from 0.7 to 2.0 m;

in thickness - from 8.0 to 20.0 mm.

1.3. Nominal dimensions and maximum deviations in thickness of all types of felt, manufactured in nominal with an interval of 1 mm. must correspond to those indicated in the table. one.

Note. The nominal thickness of the drinker for insulation is from 6.0 mm.

1.4. The designation of the felt includes the designation of the type of felt and brand, the size in thickness and the designation of this standard.

Examples of symbols Coarse-wool felt, 10 mm thick: for stuffing boxes - felt GS 10 GOST 6418-81 for gaskets grade A - felt GPRAYU GOST 6418-81 for gaskets grade B - felt GIRYO GOST 6418-81 for filters - felt GF10 GOST 6118- 81 for insulation - felt GIO GOST 6418-81

Continuation of tqOj. 2

Oooaiachsya in the type of part

II Elastomer, coarse wool

P. lastina S G

Plate PRAG

Plate PrBG Plate FG Disc SG Disc PrAG Disc FG Stuffing box FgG

Gasket AFgG

Gasket BFgG Filter FgG

Plate-laying grade B, coarse wool

Plastn on - coarse wool filter tia I Coarse-wooled gasket Disc coarse-haired A-grade gasket Coarse-haired filter disc Shaped coarse-wooled stuffing box A-shaped coarse-wooled seal

Gasket grade B curly coarse-wool-nep

Coarse hair filter

Note. A felt piece of rectangular shape up to JOO mm inclusive is called a tape, and over JOO mm it is called plastic.

1.6. Felt parts in shape and size must comply with the technical documentation of the consumer, agreed with the manufacturer.

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

Table 3

	Previous<плл
	according to the outer diameter for		■About the internal number for
		prokl * -dchk to "r-ki A		up to* brand A
St. 10 to 25 "k.tyuch.



> 100 * 200 >

> 2M » 300 »

1.8. The nominal dimensions and maximum deviations in the thickness of felt parts manufactured in nominal value with an interval of 1.0 mm must correspond to those indicated in Table. 5.

Table 4

	Aw.. oto.
		by share dl "
gaskets			proklbreath

Note. Limit deviations for * tapes and plates with a length and width over 400 mm are set to ± 1.0 km for every 100 mm additionally over 400 mm in length and width.

Table 5

1.9. The symbol for felt parts includes the designation of the types of parts and their dimensions 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;

according to curly details - after symbol it is indicated “according to the drawing> 6 _>;

Examples of symbols Coarse-wooled ring-gland, outer diameter 75 mm. internal - 50 mm, 7 mm thick:

GOST 6418-! Page 5

Grade B gasket tape, coarse wool, 80 mm long, 40 mm wide, 15 mm thick:

2. TECHNICAL REQUIREMENTS

2.1. Technical coarse wool felt and parts from it for mechanical engineering must be manufactured in accordance with the requirements of this standard according to technological regimes approved in the prescribed manner.

2.2. Technical coarse wool felt and details from it for mechanical engineering according to the composition of fibers in the mixture must correspond to those indicated in Table. 6.

Table 6

Note. The content of non-woolen fibers in the mixture is allowed due to the presence of them and reconstituted wool, production and combed coarse wool tow.

The total mass fraction of non-woolen fibers in the finished felt should not exceed that indicated in Table. 7.

2.3. Substitution allowed:

sheep factory wool with fur wool of I, 11 and III lengths, tow and acid wool from fur coat sheepskins;

up to 8% of factory wool and up to 2% of sheep's natural coarse wool with a hot-washed klunker;

up to 4% sheep natural coarse goat wool natural wool.

(Revised edition, Rev. .Ns 1).

Table 7

		Norma by suubu felt* doi
Name ls "a.1atsdv		gaskets
Name ls "a.1atsdv
Rated humidity, %
Density, g/CM*
Tensile strength (with a felt thickness of 5 mm), Pa (kgf / cm 1), not less than
Elongation at the break. %. no more"
Mass dolm of free sulfuric acid. Hi. no more
Mass fraction of plant impurities. not
Mass fraction of non-wool fibers. %. no more
Mass fraction of mineral impurities (together with ash or vegetable impurities), not more than
Capillarity (with a thickness of 10 mm or less), mm. not meiss within:

Notes:

1. The actual humidity of the felt and its details should not be tested normalized.

2. Standards for density, mass fraction of free sulfuric acid, vegetable and mineral impurities and wool fibers refer to felt with a normalized moisture content of 13%

2.4. The color of the felt should be natural. Different shades are allowed, when using dyed combed, coarse-wooled tows and restored wool.

2.5. According to physical, mechanical and chemical indicators, technical coarse-wool felt and parts made from it for mechanical engineering must comply with the standards specified in Table. 7.

2.6. The density of oil seals and gaskets of grade L, depending on their thickness and outer diameter or length, must correspond to that indicated in Table. eight.

Notes:

1. Negative tolerances must not exceed 0.02 g/cm*.

2. The maximum density should not exceed the established and table. 7 for felts of this type.

3. Density standards are set for gauges having a width of at least 7 mm. For rings having a width of less than 7 mm, they are installed in agreement with the consumer.

2.7. In terms of mechanical strength, felt for insulation must meet the following requirement: hung by one edge without distortion, the felt cavity must be 4 m long. rupture of the cavity from the action of its own mass.

2.8. Felt rings with an outer diameter of up to 60 mm inclusive are made in one piece, over 60 mm - sewn from tape, except for those rings that cannot be sewn due to the large difference between the width and thickness of the ring. Such rings are made in one piece.

At the request of the consumer, it is allowed to produce one-piece punching rings with an outer diameter of more than 60 mm.

2.9. Felt rings sewn from tape 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;

stitching is carried out in at least two rows of linen threads 105 texX5, 130 texX *. 105 texXO, 130 texX5 according to GOST 2350-73 or extra strong cotton threads 27 texXZXZ, 27 texXZXZ 18.5 texXZXZ, 16.5 texXZX2 according to GOST 6309-80.

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

The thickness of the threads is chosen depending on the width and thickness of the ring.

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

when stitching rings from tapes up to 10 mm thick, the stitching step should be no more than 6 mm, with a tape thickness of more than 10 mm - no more than 10 mm;

the cut planes of the joint must fit snugly against each other and must not be displaced;

at the junction, the thickness of the ring should not exceed the norms and maximum deviations indicated in Table. 5;

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

the bulk of the fibers in the crosslinked ring should be directed along the circumference of the ring.

2.10. Felt and details from it should not delaminate.

2.11. Gluing felt and details from it is not allowed.

2.12. The surface of the parts must be clean, with evenly removed pile, without scars. The presence of pile is allowed in the details-layings.

2.13. Details should not have tears, torn places, bevels and other mechanical damage.

2.14. The edges of the felt cavity should not have more than ±20 mm deviations from straightness per 1 m of length.

d. ACCEPTANCE RULES AND TEST METHODS

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

GOST "418-41 P. 9

4. PACKAGING, LABELING, TRANSPORT AND STORAGE

4.1. The felt cavities are tightly rolled up into a roll weighing no more than 70 kg and tied up in two places with a rope in accordance with GOST 1868-72.

At the request of the consumer and during transportation by rail tied rolls of felt must be packed in an investment fabric made of chemical threads or an investment non-woven fabric in accordance with GOST 14253-83 and other regulatory and technical documentation.

(Revised edition, Rev. No. 1).

4.2. At the end of each cavity of the felt, a stamp indicating the designation of the felt must be affixed.

4.3. Felt parts are packed in boxes in accordance with GOST 10350-81, bales or bags made of packing fabric in accordance with GOST 5530-81 or packing fabric with chemical threads according to regulatory and technical documentation. Bales or bags are sewn up manually with twine according to GOST 17308-85. The stitch length should not exceed (40 ± 10) mm.

The weight of each box, bale or bag of felt parts must not exceed 50 kg.

When packing in one box, bale or bag of felt parts of different sizes, parts of the same size must be tied with twine in packs. A label must be attached to each pack indicating the details in accordance with clause 4.4.

4.4. Transport marking should be applied to cardboard or plywood labels according to GOST 14192-77 with additional data characterizing the product:

the name of the manufacturer and its trademark;

names of felt or felt parts;

thickness of felt or dimensions of felt parts;

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

OTK stamp;

manufacturing dates;

lot numbers;

designations of this standard;

manipulation sign - "Afraid of dampness."

Before the manipulation sign "Afraid of dampness" a danger sign is applied for class 9, subclass 9.2 in accordance with GOST 19433-81.

4.5. When transporting felt to areas Far North and hard-to-reach areas, tied rolls should be sheathed with two layers of investment fabric made of man-made threads or

Page 10 GOST W18-81

investment non-woven fabric in accordance with GOST 14253-83 and tied with a rope in accordance with GOST 10350-81.

4.3-4.5. (Revised edition, Rev. J6 1).

4.6. Each batch of felt and felt parts must be accompanied by a document certifying that the product complies with the requirements of this standard and containing:

name of the manufacturer and its trademark;

name of felt or felt parts;

laboratory test results with batch number and date;

stamp OT K;

designation of this standard.

4.7. Felt and felt parts are transported by all means of transport, except for air, in covered vehicles according to the rules applicable to the respective mode of transport.

By railway These products are transported in small shipments.

When transporting felt and felt parts in transport packages, they must be formed in accordance with GOST 21929-76.

The gross weight of the package must not exceed 500 kg.

4.8. Felt should be stored in a closed ventilated area.

For air access, the base of the stack must be at least 0.2 m above the floor level of the room, the height of the stack must not exceed 2 m.

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

4.7, 4.8 (Revision, Rev. No. 2).

4.9. During storage, felt and felt parts should be treated with an anti-milling preparation at least once every 6 months.

Editor T. P. Shashina Technical editor E. V. Mityai Proofreader L. V. Snitsarchuk

Rented and surplus. 10.11 $6 Signed in psch. IS.01.S* 0.73 arb. I am. a. 0.75 arb. pr.-“tt. 0.71 account nza D. Circulation 10 0 "Tsoi 5 kop.

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BACK AND LEATHER MATERIALS AND PRODUCTS,

CHEMICAL FIBERS

Group" M1S

Amendment No. 2 to GOST 6418-81 Coarse-wool technical felt and parts for mechanical engineering. Technical conditional

Approved and put into effect by the Decree of the State Standard of Russia dated 03/24/92 .4 240

Date of introduction 01.09.92

Item 22. Table 6. Column "Type of fiber". Supplement the sixth paragraph with the words: “in the purified eiii”,

note. Replace the words: "Mixture content of non-wool fibers" with cMw content of non-wool fibers in the blend."

Paragraph 23 shall be stated in the foot of the wording:<2.3. Допускается при отсутствии сырья, указанного в 7абл. 6:

replacement of natural wool with broken cotton wool not more than 3% of the mass of natural wool.

replacement of sheep factory wool with wool of fur sheepskin semi-coarse and coarse I, 2 lengths or combed coarse-wool tow:

replacement of a cow's factory coat with sheep's factory wool or semi-coarse and coarse fur sheepskin wool 1. 2, 3 lengths (Z-th length not more than 30% of the mass of fur wool) and acid wool from fur and fur coat sheepskins (not more than 5 Chz from the mass of the mixture );

(Continued see p. 150)

(Continuation of the change to GO (TG 6418-61)

replacement of sheep and cow factory wool with natural sheep wool. OR natural goat hair not more than 5% or by weight of the mixture;

replacement of up to 8% of factory wool); up to 2% sheep vagura.tnoy rov-

L#-awprnr "tsdvykeuiya" llnlzpyug goyachstG MWttTC---

replacement of the restored wool of the skim "" of its production with "purified form or acid wool".

Clause 4.1. Zamszhgg ssy.tku: GOST I86S-72 to GOST 1666-88.

Clause 4.4. Tenth paragraph. Replace the words: "Afraid of dampness" aa "Keep away from moisture";

delete the eleventh paragraph

Paragraph 4.7 shall be stated in the new wording: “4.7. Felt and felt parts* are transported by all grandfathers in covered transport vehicles according to the rules applicable to the transport of the corresponding type.

By rail, these products are transported in small shipments.

When transporting felt and felt parts in transport* packages, they must be formed in accordance with GOST 26663-86. Package sizes - according to GOST 24597-81. For packaging, flat pallets are used in accordance with GOST 9078-84. Bonding stalemates - according to GOST 21650-76. Means of a fastening of packages is a steel packing wire in accordance with GOST 3560-73. GOST 503-81. GOST 6009-74

The gross weight of the package must be no more than 50E kg.