Paronite gaskets Mon. Paronite PON (A) general purpose Paronite gasket certificate of conformity

Pa-ro-nit - fox-to-howl ma-te-ri-al, pre-na-zen-ny for from-go-to-le-niya ger-me-ti-zi-ru-yu pro- doc. Pa-ro-nit represents a press-so-van-ny re-zi-new mixture, into which an as-devil-that-woo-lok is introduced -but. Different-but-kind-ness of pa-ro-ni-that fer-ro-nit to-half-ni-tel-but ar-mi-ru-is-sya metal-li-ches-coy. An important property of pa-ro-ni-ta is its you-so-kaya ther-mos-that-bone, which it sounds like to take it in motion -ha-te-lyakh vnutr-ren-not-combustion.

Pro-of-waterst-in pa-ro-ni-ta pro-out-goes in the form of lis-tos with a thickness of up to 6 mm. He is easy-to-yes-is-Xia me-ha-ni-ches-koi-work-bot-ke - cutting and cutting. From it, it is quite easy to cut out the pads of a complex con-fi-gu-ra-tion. The pads from para-ro-ni-ta-me-nya-are-sy in paradise-o-nah with moderate, tro-pi-chis-kim and cold-ny ma-tom at the temperature of the environment is not less than -60 ° C. This ma-te-ri-al does not appear-la-is-sya kor-ro-zi-on-no-active element in work with al-mi-ni -e-you-mi ano-di-ro-van-us-mi spla-va-mi, la-tunu and galvanized steel with chrome-matte pass-si-vi-ro-va -n-eat. For pa-ro-ni-ta and from-go-to-le-niya from not-th-cl-dock tre-bo-va-nia GOS-Ta 481-80 yav-la-yut-sya-za -thel-us-mi. The weight of pa-ro-ni-that varies-and-ru-is-sya in-vi-si-mos-ti from the thickness of the foil, and the density of the composition is from 1 , 8 to 2.0 g / cm 3.

Ka-honest-ven-fox-to-howl pa-ro-nit it is easy to recognize: when the fox is curled, it should not be fucking or or cracking. We ga-run-ti-ru-e, that all kinds of pa-ro-ni-ta, are-la-e-my Com-pa-ni-her "As-bes-t-prom-snub" the answer is stan-dar-there ka-cht-va and all not-about-ho-di-my ser-ti-fi-ka-you have.

Different-but-kind-nos-ty pa-ro-ni-ta:

Pa-ro-nit PON-B of general knowledge

Pa-ro-nit PON-B represents fox-to-how ma-te-ri-al, from-go-to-flax to pa-ro-no-to-v wal-tsakh from mixture-si-lo-kon chri-zo-ti-lo-in-go as-be-s-ta, sin-te-ti-chu-ka-u-chu-ka, on-half-ni-te-lei and vol-ka-ni-zi-ru-yu-yu-py group. You-start-ka-e-Xia in the form of lis-tov and pro-cl-doc.

The thickness of the sheets is from 0.4 to 5.0 mm with a density of 1.8 to 2.0 g / cm 3.

The area of \u200b\u200bapplication of pa-ro-no-ta PON-B:

In the form of pro-cl-dock of various sizes and configurations for sealing flat connectors of non-moving joints one-non-ny type: "smooth" with the pressure of working environment not more than 4 MPa; "shin-groove", "vy-stup-vpa-di-na" so-su-dov and ap-pa-ra-tov, na-so-sov, ar-ma-tu-ry, tru-bop-ro -water-dov, com-press-so-ditch, move-ha-te-lei inner-ren-not-combustion-and other ag-re-ha-tov, ra-bo-ta- yu-shih in different-personal environments.

Pro-of-in-dit on GOST 481-80.

Pa-ro-nit PMB mas-lo-ben-zos-toy-cue

Pa-ro-nit PMB is a fox ma-te-ri-al, from-go-to-flax on pa-ro-no-that-vy tsakh from mixture-si-lo-khri-zo-til-as-be-s-ta, sin-te-ti-ti-chash-ka-u-chu-ka, na-half-no-te -lei and vol-ka-ni-zi-ru-yu-yu group.

Pro-of-in-dit on GOST 481-80.

Pa-ro-nit PMB gra-fi-ti-ro-van-ny

Pa-ro-nit gra-fi-ti-zi-ro-van-ny represents-fox-that-how-ma-te-ri-al, from-go-to-flax on pa-ro-no-to-v-tsach from mixture-si-lo-khri-zo-ti-lo-vo-go as-be-s-ta, sin-te-ti-chi-ko th ka-u-chu-ka, on-half-no-te-lei and vol-ka-ni-zi-ru-yu-u-u-u-u-py.

The thickness of the sheets is from 0.4 to 5.0 mm with a density of 1.5 to 2.0 g / cm 3.

The area of \u200b\u200bapplication of the para-ro-ni-ta PMB:

Layouts of different sizes and configurations for sealing flat connectors not-moving-connected niy with giving a working environment no more than 4 MPa, so-su-dov and ap-pa-ra-tov, na-so-sov, ar-ma-tu- ry, labor-bop-ro-vo-dov, com-press-so-ditch, dvig-ga-te-lei, internal-ren-not-combustion, and other ag-re-ga-tov , work-bo-ta-yu-shih in different-personal environments.

Pro-of-in-dit on TU 2575-208-00149363-2002.

Pa-ro-nit pa ar-mi-ro-van-ny

Pa-ro-nit ar-mi-ro-van-ny represents-is-a-fox-to-how ma-te-ri-al, from-go-to-flax to pa-ro-ni- then-out rolls from a mixture of a-lo-con chri-zo-ti-lo-in-go as-be-s-ta, na-tu-ral-no-go ka-u-chu-ka , on-a-half-no-te-lei and vol-ka-ni-zu-yu-u-py group.

The thickness of the sheets is from 0.8 to 2.0 mm with a density of 1.9 to 2.5 g / cm 3.

The area of \u200b\u200bapplication of ar-mi-ro-van-no-go pa-ro-no-ta:

Layouts of different sizes and configurations for sealing flat connectors not-moving-connected niy with giving a working environment no more than 4 MPa, so-su-dov and ap-pa-ra-tov, na-so-sov, ar-ma-tu- ry, labor-bop-ro-vo-dov, com-press-so-ditch, dvig-ga-te-lei, internal-ren-not-combustion, and other ag-re-ga-tov , work-bo-ta-yu-shih in different-personal environments.

Pro-of-in-dit on GOST 481-80.

Pa-ro-nit PE electric-tro-li-grain

Pa-ro-nit elec-tro-li-zer-ny is-a-fox-to-how ma-te-ri-al, from-go-to-flax on pa-ro -some rolls from mix-si-lo-con chri-zo-til-as-be-s-ta, sin-te-ti-ch-ch-go ka-u-chu-ka , on-half-no-te-lei and vol-ka-ni-zi-ru-yu-shcha group.

The thickness of the sheets is from 1.0 to 5.0 mm with a density of 1.6 - 2.0 g / cm 3.

The area of \u200b\u200bapplication of elec-tro-li-zer-no-go pa-ro-no-ta:

In ka-chet-ve pro-kla-doch-no-go ma-te-ri-a-la for the seal-not-nia of the co-bi-ra-e-my in the ba-ta-rey of the cells, in elek-tro-li-ze-rah and for electrically-three-ches-koi isolation of cells from each other.
Mi-ni-mal-noe pressure, not-about-ho-di-mine for ger-ma-ti-zation of co-unity-non-nia - 10 MPa for elektro-li-ze -rov, working under pressure of 0.02 MPa, and 30 MPa for elec-tro-li-zers, working under pressure -le-ni 1 MPa. It is also used for the compaction of non-moving co-one-non-ny co-su-dov, ap-pa-ra-tov, na-co- owls ar-ma-tu-ry and tru-bop-ro-vo-dov.

Pro-of-in-dit on GOST 481-80.

Pa-ro-nit PC

Pa-ro-ni-ti PC (sour-tost-that-kiy) from-go-tav-li-va-t-Xia in accordance with GOST 481-80 in the form of lis-tov thick from 1.0 mm to 3.0 mm in different sizes made of ready-made flax on rollers from a mixture, the mixture includes compound lumps -po-en-you (vo-lok-na chri-zo-ti-lo-vo-go as-be-s-ta, sin-te-ti-chi-ka-u-chuk, na-half- ni-te-whether vol-ka-ni-zi-ru-u-u-group, etc.).

Pa-ro-nit PK ob-la-da-et you-with-co-coy resistance to ag-res-siv-ny environments, such as sour-lo-that, shch-lo-chi, ox-li-te-li, nit-rose-nye, or-ga-no-chick-ras-t-ri-te-li and other ag-res-siv-nye gases.

Pa-ro-nit PK use-use-it-is in ka-chest-ve seals-nya-yu-shi-go and pro-kla-doch-no-go ma-te-ri-a-la, do not lose their ha-rak-te-ris-ti-ki in the conditions of the edge of the se-vera, in paradise-about-nah, tro-pi-ches-ko- go and sub-tro-pi-ches-kli-ma-ta, take-me-nya-sya in co-uni-not-no-yah type-pa "thorn-groove", "vp- di-na-vy-stup "," smooth-kie ", Na-so-sy, com-press-so-ry, tru-bop-ro-vo-dy, ar-ma-tu-ra, etc.

Paronite of general purpose PON (A) grade is made according to GOST 481-80 from a rubber mixture based on synthetic or natural rubber with the addition of chrysotile asbestos fibers and modifying additives.

Paronite PON (A) is used for the manufacture of gaskets for sealing permanent flat joints of mechanisms and devices. If the paronite gaskets are correctly installed into the sealed unit, the sealed joint is completely sealed. The material is produced in the form of sheets with a thickness of 2.0 to 6.0 mm, dimensions from 500x500 mm to 1500x3000 mm. By agreement between the consumer and the manufacturer, it is possible to produce gaskets according to the approved regulatory documents of the customer.

Paronite PON (A) is the most common gasket and sealing material. It lends itself easily to mechanical processing: cutting and chopping. The yield point of paronite is 320 MPa. At this value of pressure, the material begins to "flow", filling all leaks, sealing the connection. When choosing a paronite sheet, you should correctly determine its required thickness. The thinner the sheet, the more effective the sealing. But on the other hand, the thickness of the paronite should be sufficient to fill the connecting lock - "thorn-groove", "depression-protrusion", etc.

Paronite and products made from it can be used in cold, temperate and tropical climates.

Operating conditions, scope of paronite PON GOST 481-80

Physical and mechanical properties of PON paronite in accordance with GOST

* - the value is indicated for paronite 2 mm and thinner.

Acceptance

Paronite PON (A) or gaskets made from it are accepted in batches at the manufacturing plant by the technical control section. 100% of products are subject to visual inspection. Acceptance is carried out according to the norms established by the Interstate Standard, or according to the standard agreed with the customer. For compliance with mechanical and physical properties, products are checked selectively, in the amount of several pieces from the batch.

Each batch of PON (A) paronite is accompanied by a quality certificate with the results of acceptance tests attached.

manufacturer's warranty

Subject to the conditions of transportation and storage in accordance with GOST 481-80, the manufacturer establishes a guaranteed storage period for general-purpose paronite of the PON (A) brand and gaskets from it - two years from the date of production.

INTERSTATE STANDARD

PARONIT AND GASKETS FROM IT

TECHNICAL CONDITIONS

Official edition

ITTK STANDARDS PUBLISHING HOUSE Moscow

to GOST 481-80 Paronnt and attachments Hi. Specifications (see reprint (July 1990) with Amendments Nk 1 1, 2, 3, 4; reprint (June 1992) with Amendments M "1, 2, 3, 4, 5; edition (June 2002 .) from

(IUS # 8 2004)

INTERSTATE STANDARD

PARONIT AND GASKETS FROM IT Specifications

Compressed asbestos fiber sheets and gaskets from it. Specifications

Date of introduction 01.01.81

This standard applies to sheet paronite and gaskets made of it, intended for sealing flat connectors of units with various media.

Paronite gaskets are used in areas with temperate, tropical and cold climates at temperatures up to minus 60 ° C.

The requirements of this standard are mandatory.

1. BRANDS AND SIZES

1.1. Depending on the purpose, paronite of nine grades is produced (Table 1).

Table 1

Official edition Reprinting prohibited

★

© Standards Publishing House, 1980 © IPK Standards Publishing House, 2002

Continuation of table. 1

(Changed edition, Amendments No. 2, 3, 4).

1.2. The roughness parameter of the sealed surfaces Rz according to GOST 2789 should be no more than 40 microns.

1.3. The size of paronite sheets should correspond to those indicated in table. 2, 3.

Note. By agreement between the manufacturer and the consumer, it is allowed to manufacture paronite of other sizes in length and width.

table 2

Table 3

Continuation of table. 3

An example of the symbol for paronite grade PON-A, 2.0 mm thick, 500 mm wide and 500 mm long:

Paronite PON-A 2,0x500x500 GOST 481-80

The same, in a tropical version:

Paronite PON-AT 2.0x500x500 GOST 481-80 Gaskets made of paronite PON-A when ordering:

Gasket_PON-A GOST 481-80

part number as per drawing Same, tropical version:

Gasket_PON-AT GOST 481-80.

part number according to the drawing (Modified edition, Rev. No. 2, 3, 4).

1.4. Paronite is made in the form of sheets and spacers.

2. TECHNICAL REQUIREMENTS

2.1. Paronite and gaskets from it must be manufactured in accordance with the requirements of this standard for technological regulations approved in the prescribed manner. The gaskets must comply with the drawings agreed between the manufacturer and the consumer.

(Modified edition, Amendment No. 4).

2.2. The surface of paronite and gaskets made of it should be flat without tears, folds, scuffs and breaks, bulges, cavities and foreign inclusions.

Slight hairiness and slight uncolored asbestos on the surface and along the edges are allowed.

It is allowed to agree on a control sample of the appearance.

2.3. For the manufacture of PA grade paronite, reinforcing steel mesh No. 09 in accordance with GOST 3826 should be used.

2.4. The gaskets are cut out of paronite sheets, while the paronite should not exfoliate and crumble. The method of making gaskets with a diameter of more than 1500 mm is indicated in the appendix.

(Modified edition, Amendment No. 5).

2.5. In terms of physical and mechanical indicators, paronite sheets and gaskets must comply with the standards specified in table. 4.

Table 4

^ Value for paronite less than 2 mm thick.

(Changed edition, Amendments No. 1, 2, 3, 4, 5).

2.6. Paronite must ensure complete tightness of the sealed joints.

2.7. Paronite grade PMB is not corrosive when working with anodized aluminum alloys, brass and galvanized steel with chromate passivation.

(Modified edition, Amendment No. 1).

2.8. Paronite should be resistant to bending and should not break and crack during testing.

2.9. For work in areas with a tropical climate, the gaskets are made of paronite with the use of fungicides.

Paronite gaskets of the PMB-1 and PK brands are efficient in tropical climates without the use of fungicide in the manufacture of paronites.

(Modified edition, Amendments No. 4, 5).

3. RULES OF ACCEPTANCE

3.1. Paronite and gaskets are accepted in batches. A batch is considered paronite sheets of the same brand and one size in thickness in an amount not exceeding 10,000 kg or gaskets of the same size not exceeding 30,000 pcs. For gaskets with an outer dimension less than 60 mm, the batch size is not more than 100,000 pcs.

At the request of the consumer, each batch of gaskets is accompanied by a quality document containing:

The name of the manufacturer and (or) its trademark;

Dimensions of paronite sheets or gasket numbers (details);

Batch number;

Date of manufacture;

Net weight;

The price of one retail spacer;

Designation of this standard;

Letter "T" for paronite and tropicalized gaskets;

Number of seats in the party;

Test results.

(Changed edition, Amendments No. 1,3, 4, 5).

3.1a. At the request of the consumer, each batch of gaskets is accompanied by two samples of at least 200x200 mm in size, cut from paronite sheets from which the gaskets were cut.

(Modified edition, Amendments No. 3, 4).

3.2. Acceptance tests are carried out in the following scope:

In appearance - 100%;

By and. 1.3 - at least 10 sheets or five spacers from the batch;

By pi. 2.5, 2.8 - at least three sheets from the party;

By and. 2.6 - at least three sheets from every tenth lot.

(Modified edition, Amendment No. 3).

3.3. Upon receipt of unsatisfactory test results for at least one of the indicators, repeated tests are carried out on a double sample from the same batch. The results of repeated tests are valid for the entire batch.

Upon receipt of unsatisfactory results of repeated tests, the manufacturer is allowed to carry out 100% control.

(Modified edition, Amendment No. 4).

4. CONTROL METHODS

4.1. The surface of paronite and gaskets is checked visually or by comparison with control samples of appearance.

(Modified edition, Amendment No. 4).

4.2. The dimensions of paronite are determined in accordance with GOST 24039.

The dimensions of the spacers are determined in accordance with the drawing.

4.3. From each selected sheet, cut for testing:

By pi. 2.5 (Table 4, indicators 1, 3, 4, 5, 6), 2, 8 - one sample;

By and. 2.5 (Table 4, indicator 2) - two samples;

By and. 2.6 - three samples.

The distance from the sample to the edge of the sheet is at least 30 mm.

4.2, 4.3. (Modified edition, Amendment No. 3).

4.4. The density of paronite is determined according to GOST 24039, while deviations according to individual definitions are allowed by no more than 10% of the norm.

45. Determination of conditions of strength at break

Samples with a size of 20x110 mm are punched out with a maximum deviation of +0.5 mm, in the direction transverse to rolling. The samples are kept for (60 + 5) min in an oven at a temperature of (110 + 5) ° C, while the samples should be located so that free air access is provided over their entire surface. Then the samples are cooled for at least 30 min in a desiccator according to GOST 25336, filled with calcium chloride according to TU 6-09-5077, at an ambient temperature of 23 ° C.

Measure the thickness of the samples.

The samples are clamped in a tensile testing machine with a distance between the clamps (50 + 2) mm and a movable clamp speed (250 + 10) mm / min and break them.

The rupture of the samples is carried out no later than 10 minutes after removing them from the desiccator. If the sample breaks at the point of its clamping, the test result is not taken into account and tests are carried out on a new sample.

The variation error should not exceed 1% of the measured load.

Conditional strength at break (G) in megapascals (kgf / cm 2) is calculated by the formula

where P is the load causing the sample to rupture, N (kgf);

S is the cross-sectional area of \u200b\u200bthe sample before testing, m 2 (cm 2).

The arithmetic mean of the results of all determinations, rounded to the nearest whole number, is taken as the test result, while deviations from the norm for individual determinations by no more than 10% are allowed.

(Modified edition, Amendment No. 4).

4.6. The increase in the mass of paronite in liquid media is determined according to GOST 24037, while deviations according to individual definitions are allowed by no more than 10% from the norm.

(Modified edition, Amendment No. 4).

4.7. The decrease in mass in liquid media is determined according to GOST 24037 on samples of 20x20 mm in size with a maximum deviation of +0.5 mm.

(Modified edition, Amendment No. 5).

4.8. The compressibility and recoverability of paronite is determined according to GOST 24038, while deviations according to individual definitions are allowed by no more than 10% from the norm.

(Modified edition, Amendment No. 4).

4.9. Determination of compaction capacity

4.9.1. Paronite grades PON and PA, PON-A, PON-B, PON-V are tested for sealing ability in a steam environment in a laboratory autoclave of the AP-1 type (Fig. 1).

Nine annular paronite samples with an outer diameter (120 + 1) mm and an inner diameter (80 + 1) mm, covered with oil graphite paste (composition: mineral oil with a kinematic viscosity at 100 ° C (6-11) m 2 / s 65-85% and graphite according to GOST 5420 or GOST 5279 15-35%) is clamped between the flanges (steel 40X according to GOST 4543) of the collector. The presence of grease on the end part of the samples is not allowed.

(Modified edition, Amendment No. 4).

Tests are carried out at a vapor pressure in the collector (10 + 0.5) MPa [(100 + 5) kgf / cm 2], pressure on the samples (22.5 + 0.5) MPa [(225 + 5) kgf / cm 2 ], collector temperature (450 + 10) ° С and test time (30 + 2) min.

The samples ensure the tightness of the sealed joints if there is no vapor leakage during the test.

4.9.2. Paronite grades PON, PMB, PMB-1, PA, PON-A, PON-B, PON-V are tested for sealing ability in liquid media in a laboratory autoclave of the AP-2 type (Fig. 2).

Kerosene is used as a control liquid.

Nine annular paronite specimens with an outer diameter (120 + 1) mm and an inner diameter (80 + 1) mm, covered with graphite oil paste, are clamped between the manifold flanges. The presence of grease on the end part of the samples is not allowed.

The tests are carried out at the pressure of the liquid medium in the manifold (15 + 0.5) MPa [(150 + 5) kgf / cm 2], while the pressure is gradually raised every 15 minutes by (2.5 + 0.5) MPa [( 25 + 5) kgf / cm 2], pressure on samples (32.4 + 0.5) MPa [(324 + 5) kgf / cm 2], temperature of the liquid medium (20 + 5) ° С and test time at the specified parameters (30 + 2) min.

The samples ensure the tightness of the sealed joints if there is no kerosene leakage during the test.

4.9.1, 4.9.2. (Modified edition, Amendments No. 1, 4).

4.10. (Deleted, Amendment No. 1).

4.11. Bending resistance of paronite is determined according to GOST 24036.

Autoclave type А11 -1

1 - steering wheel; 2, 6, 7 - pressure gauge; 3 - blowdown valve; 4 - flanged manifold; 5 - valve for venting steam from the collector; 8 - oil drain valve; 9 - manual pump; 10 - oil container; 11 - pump idle valve; 12, 13 - shut-off valves; 14 - boiler; 15 - electric heating; 16 - autoclave frame; 17- hydraulic press; 18 - electrical heating of the flanged manifold

Autoclave A11-2

1 - steering wheel; 2 - flanged manifold; 3 - autoclave frame; 4 - safety valve; 5-hydraulic press; 6 - valve for draining the collector fluid; 7, 13 - check valves; 8 - shut-off valve for idling of the pump; 9 - container for liquid medium; 10- pump; 11 - pump idle valve; 12 - oil container; 14 - valve for oil drain; 15-17- manometers; 16- purge valve

5. LABELING, PACKAGING, TRANSPORTATION AND STORAGE

5.1. A clear stamp is applied to each paronite sheet with indelible paint or a label is glued with the indication:

Paronite brands;

Batch numbers;

Manufacturing dates;

Sheet thickness;

Letters "T" for tropical paronite.

(Modified edition, Amendment No. 5).

5.2. Paronite sheets are packed in wooden boxes or lathing with a gross weight of not more than 500 kg.

It is allowed to pack paronite sheets on flat wooden pallets with a gross weight of not more than 1500 kg with metal strapping straps in accordance with GOST 3560. Packages on flat pallets are formed in accordance with the requirements of GOST 26663.

When transported in universal containers or covered cars or vans, it is allowed to ship paronite without packaging.

It is allowed to roll up paronite up to 2 mm thick and fasten it with twine or metal tape.

The gaskets are tied in bundles of 25 to 100 pcs. and packed in wooden boxes and cardboard boxes or in metal reusable containers.

The gaskets are tied in bundles of 25 to 100 pcs. technical twine according to GOST 17308 or chemical fiber twine.

Packs or bags with gaskets are packed in wooden boxes, boxes made of fiberboard, corrugated cardboard, cardboard boxes with a maximum load of not more than 50 kg or in reusable metal containers.

Gaskets with an outer size of less than 100 mm and a simple configuration are allowed to be untied in bundles in paper bags in accordance with GOST 13502, with a gross weight of not more than 5 kg.

Gaskets 350 mm in size and more are packed in other types of packaging weighing not more than 500 kg, ensuring their safety during transportation.

For retail trade, the gross weight of one packing unit of pads should not exceed 30 kg.

(Modified edition, Amendments No. 1, 3).

5.3. A label is attached to each packaging unit, marked in accordance with GOST 14192, with the following designations:

The name of the manufacturer and (or) its trademark;

Names and brands of paronite;

Paronite sheet sizes or gasket numbers (details);

Batch numbers;

Manufacturing dates;

Net weights;

Designations of this standard;

T for paronite and tropicalized gaskets.

For gaskets in a tropical design, tied in packs, a different type of marking is allowed by agreement with the consumer.

(Modified edition, Amendments No. 2, 3, 5).

5.4. Paronite and gaskets are transported by all types of transport in covered vehicles in accordance with the rules for the carriage of goods in force for this type of transport.

(Modified edition, Amendment No. 2).

5.5. Paronite and gaskets should be stored in closed rooms, protecting from direct exposure to sunlight, organic solvents, lubricating oils, acids and other substances that destroy paronite, at a distance of at least 1 m from heat-emitting devices and at a temperature not higher than 35 ° C.

The humidity in the room for storing PA paronite should be no more than 65%.

5.6. When storing and transporting paronite at temperatures below 0 ° C, gaskets can be made from it after the paronite has been kept for 24 hours at (20 + 5) ° C.

6. MANUFACTURER'S WARRANTIES

6.1. The manufacturer guarantees the compliance of paronite and gaskets with the requirements of this standard, subject to the conditions of transportation and storage.

6.2. The guaranteed shelf life of paronite and gaskets is two years from the date of manufacture.

6.3. The warranty period of operation or the guaranteed operating time of the gaskets must be equal to the warranty period of operation or the guaranteed operating time of units or assemblies in which they are mounted without a connection connector.

(Introduced additionally, Amendment No. 4).

METHOD FOR PRODUCING GASKETS WITH A DIAMETER OVER 1500 mm

In the manufacture of gaskets with a diameter of more than 1500 mm, it is allowed to join the paronite in a "dovetail" or overlap.

When joining with an overlap, the cut is made along an inclined to the ends to be glued.

For gluing, use glue No. 88H.

The glued parts are kept for 2 hours under a pressure of 0.5 MPa at (20 ± 5) ° C.

INFORMATION DATA

1. DEVELOPED AND INTRODUCED by the Ministry of Oil Refining and Petrochemical Industry of the USSR

2. APPROVED AND INTRODUCED INTO EFFECT by the Decree of the USSR State Committee for Standards dated 27.03.80 No. 1394

3. REPLACE GOST 481-71

4. REFERENCE REGULATORY AND TECHNICAL DOCUMENTS

5. The limitation of the period of validity was removed according to the protocol No. 5-94 of the Interstate Council for Standardization, Metrology and Certification (NUS 11-12-94)

6. EDITION (June 2002) with Amendments No. 1, 2, 3, 4, 5, approved in December 1982, May 1985, February 1988, February 1990 and December 1991 (NUS 3-83, 8-85, 5-88, 5-90, 4-92)

Editor V.N. Kopysov Technical editor V.N. Prusakova Proofreader M.V. Buchnaya DTP by I.A. Naleykina

Ed. persons. No. 02354 dated 14.07.2000. Put in the set 07.06.2002. Signed for printing on 09.07.2002. Uel. print l. 1.86. Academic and Publishing House 1.65.

Circulation 91 copies. C 6345. Zak. 574.

IPK Standards Publishing House, 107076 Moscow, Kolodezny per., 14. e-mail: Typeset in the Publishing House on a PC

Branch IPK Publishing house of standards - type. "Moscow printer", 103062 Moscow, Lyalin per., 6.