1、HH-P-L5LF 53 7777774 0004320 T W HH-P-151F July 19, 1985 SUPERSEDING . HH-P-15le June 22, 1961 FEDERAL SPECIFICATION PACKING; RUBBER-SHEET, CLOTH-INSERT This specification was approved by the Assistant Administrator, Office of Federal Supply and Services, General Services Administration, for .the us
2、e of all Federal agencies. 1, SCOPE AND CLASSIFICATION 1.1 Scope, Cloth-insert, rubber-sheet packing covered by this specifica- tion is intended for flange joints for water or brine services up to 250 pounds pressure and for ventilating systems, 1.2 Classification. 1.2.1 Classes. Packing covered by
3、this specification shall be of the following classes as specified (see 6.2.1): Class 1 - Commercial. Class 2 - Polychloroprene rubber. Class 3 - Styrene-butadiene rubber, Class 4 - Acrylonitrile-butadiene rubber. 1.2.2 Thickness. Packing covered by this specification shall be of the thickness specif
4、ied (see 6.2.1). 2. APPLICABLE DOCUMENTS 2.1 The following documents, of the issues in effect on date of invita- tion for bids or request for proposal, form a part of this specification to the extent specified herein: Federal Specifications A-A-1683 - Tape, Pressure-Sensitive Adhesive (Packaging, Pa
5、per). PPP-B-585 - Boxes, Wood, Wirebound. PPP-B-601 - Boxes, Wood, Cleated-Plywood. PPP-B-621 - Boxes, Wood, Nailed and Lock-Corner. PPP-B-636 - Box, Shipping, Fiberboard. PPP-B-640 - Boxes, Fiberboard, Corrugated, Triple-Wall. PPP-B-1055 - Barrier Material, Waterproof, Flexible. FSC 5330 . DISTRIBU
6、TION STATmENT A -Approved- for -public release; distribution unlimited- Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-HH-P-ISIF 53 M 9997974 0004321 I HEI-P-151F Federal Standards FED-STD-191 - Textile Test Methods. FED-Sm-601 - Rubber: Sampling an
7、d Testing, (Activities outside the Federal Government may obtain copies of Federal specifications, standards and commercial item descriptions as outlined under General Information in the Index of Federal Specifications, Standards and Commercial Item Descriptions. The Index, which includes cumulative
8、 bimonthly supplements as issued, is for sale on a subscription basis by the Superinten- dent of Documents, U.S. Government Printing Office, Washington, DC 20402, (Copies of listed federal and military standards, specifications, Commercial Item Descriptions (CIDs), handbooks and associated documents
9、 listed in the Department of Deaense Index of Specifications and Standards (DoDISS), should be obtained from the DoD Single Stock Point, Commanding Officer, Naval Publications and Forms Center, 5801 Tabor Avenue, Philadelphia, PA 19120. Copies of industry association documents should be obtained fro
10、m the sponsor. Copies of all other listed documents should be obtained from the contracting activity or as directed by the contracting officer. (Federal Government activities may obtain copies of Federal standardization documents and the Index of Federal Specifications, Standards and Commercial Item
11、 Descriptions from established distribution points in their agencies.) Military Standards MIL-STD-105 - Sampling Procedures and Tables for Inspection by MIL-STD-129 - Marking for Shipment and Storage. Attributes. (Copies of military standards required by contractors in connection with specific procu
12、rement functions should be obtained from the procuring activity or as directed by the contracting officer.) 2,2 Other publications, The following documents form a part of this specification to the extent specified herein. Unless a specific issue is identified, the issue in effect on date of invitati
13、on for bids or request for proposal shall apply. AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) D 395 - D 412 - D 413 - D 573 - D 865 - D 3183 - D 3951 - Test Methods for Rubber Property - Compression Set. Test Methods for Rubber Properties in Tension. (DoD adopted) Test Methods for Rubber Proper
14、ty - Adhesion to Flexible Test Methods for Rubber - Deterioration in an Air Oven. Test Methods for Rubber-Deterioration by Heating in Air Practice for Rubber - Preparation of Pieces for Test Standard Practice for Commercial Packaging. (DoD adopted) (DoD adopted) Substrate. (DoD adopted) (DoD adopted
15、) (Test Tube Enclosure). (DoD adopted) Purposes from Products. (DoD adopted) 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-HH-P-151F (Application for copies should be addressed to the American Society for Testing and Materials, 1916 Race Street,
16、Philadelphia, PA 19103.) (Industry association specifications and standards are generally available for reference from libraries. They are also distributed among technical groups and using Federal agencies.) 3. REQUIREMENTS 3.1 First article. When specified (see 6.2.11, a sample shall be subjected t
17、o first article inspection (see 4.3 and 6.3). 3.2 Material. The packing shall consist of alternate layers of rubber compound and cotton fabric. Fabric shall be completely immersed in elastomer so that each fiber is coated with rubber. 3.2.1 Rubber classes. 3.2.1.1 Class 1. The rubber compound used i
18、n the manufacture .of class 1 packing shall be natural rubber, synthetic rubber (other than butyl) or a mixture of natural and synthetic rubber other than butyl. 3.2.1.2 Class 2. The rubber compound used in the manufacture of class 2 packing shall utilize polychloroprene as the base material. 3.2.1.
19、3 Class 3. The rubber compound used in the manufacture of class 3 packing shall utilize a copolymer product of butadiene and styrene as the base material. 3.2.1.4 Class 4. The rubber compound used in the manufacture of class 4 packing shall utilize a copolymer product of butadiene and acrylonitrile
20、as the base material. 3.2.2 Fabric. Cotton fabric used as the cloth insertion shall be a chafer duck in accordance with 3.4. The fabric shall be evenly and firmly woven and as free from unsightly defects, dirt, knots, lumps and irregularities of twist as is consistent with good manufacturing practic
21、e. 3.3 Construction. Both faces of the packing shall be of rubber. The layers of rubber compound shall be of equal and uniform thickness. There shall be one ply of fabric in packings less than 1/8-inch thick. Packings 1/8-inch thick and over shall be made with one ply of fabric for each 1/16-inch th
22、ickness. 3.4 Fabric insert. The physical properties of the fabric insert shall be as specified in 3.4.1 and 3.4.2. 3.4.1 Weight. The weight of the fabric shall be 10 to 12 ounces per square yard (see 4.5.1.1). 3.4.2 Breaking strength. The breaking strength of the fabric shall be not less than 125 po
23、unds when tested as specified in 4.5.1.2. 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-HH-P-15 1F 3,5 Rubber compound. The physical properties of the rubber compound shall be as specified in 3.5.1 through 3.5.5.2. 3.5.1 Tens,ile strength. 3,5.1,
24、1 Before aging. The tensile strength of the rubber compound before aging shall be not less than 1500 pounds per square inch (lb/inz) (see 4.5.2.1) . 3.5.1.2 After aging. The tensile strength of the rubber compound after accelerated aging as specified in 4.5.2.3 shall be not less than 80 percent of t
25、he tensile strength of the unaged rubber compound. 3.5.2 Ultimate elongation. The ultimate elongation of the rubber compound before aging shall be not less than 250 percent (see 4.5.2.2). 3.5.3 Compression set. The compression set of the rubber compound determined by the method specified in 4.5.2.4
26、shall be not more than 25 percent . 3,5.4 Resistance to water. 3.5.4.1 Swelling, The increase in volume of the rubber compound in water shall not exceed 20 percent when tested as specified in 4.5.2.5.1, 3.5.4.2 Extraction, The amount of wacer-soluble matter in the rubber compound shall not exceed 0.
27、5 percent when tested as specified in 4.5.2.5.2. 3.5.5 Resistance to oils. 3.5.5.1 Class 2, polychloroprene rubber. The increase in volume of the rubber compound in class 2 packing shall not exceed 100 percent when tested as specified in 4.5.2.6,1, 3.5,5,2 Class 4, acrylonitrile-butadiene rubber. Th
28、e increase in volume of the rubber compound in class 4 packing shall not exceed 46 percent when tested as specified in 4,5.2,6.2, 3.6 Adhesive bond. When tested as specified in 4.5.3, the bond strength between rubber layers and fabric insertions shall be not less than 15 pounds per inch of width. 3.
29、7 Width and weight of rolls. Unless otherwise specified (see 6.2.1), packing shall be furnished in rolls 35 to 44 inches wide with trimmed edges and weighing not less than 100 pounds (see 4.5.4) . 3.8 Thickness, The thickness of the packing at any point shall not differ frdm the specified thickness
30、by more than the following amounts (see 4.5.5): For thickness 3/32 inch or less 2 0.016 inch For thickness over 3/32 inch 5 0.02 inch 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-HH-P- 15 1F 3.9 Workmanship. The surface shall be smooth and free
31、from pits, lumps and other defects which may affect the serviceability of the packing (see 4.5.6). 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for inspection. Unless otherwise specified in the contract or purchase order, the contractor is responsible for the performance of all inspection requ
32、irements as specified herein. - Except as otherwise specified in the contract or purchase order, the contractor may use his own or any other facilities suitable for the performance of the inspection requirements specified herein, unless disapproved by the Government. The Government reserves the righ
33、t to perform any of the inspections set forth in the specification where such inspections are deemed necessary to assure that supplies and services conform to prescribed requirements. 4.2 Classification of inspections. The inspection requirements specified herein are classified as follows: (a) First
34、 article inspection (see 4.3). (b) Quality conformance inspection (see 4.4). 4.3 First article inspection. First article inspection shall consist of the tests and examinations specified in table I and 4.5. Test data shall be recorded (see 6.2.2). TABLE I. Characteristic Fabric insert: Weight Breakin
35、g strength Tensile strength Ultimate elongation Accelerated aging Compression set Resistance to water Swelling Extraction Class 2 Class 4 Adhesive bond Width Thickness Workmanship Rubber compound: Resistance to oils First article inspection. Requirement 3.4.1 3.4.2 3.5.1 3.5.2 3,5.1.2 3.5.3 3.54 3.5
36、.4.1 3.5.4.2 3.5.5 3.5.5.1 3b5.592 3.6 37 3.8 3.9 Test paragraph 4.5.1.1 4.5.1.2 4.5.2.1 4.5.2.2 4.5.2.4 4.5.2.5 4.5.2.5.1 4.5.2.5.2 4.5.2.6 4.5.2.6.1 4.5,2.6.2 4.5.3 4.5.4 4.5.5 4.5.6 4.5.2.3 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-HH-P-lr
37、SLF 53 9999974 0004325 7 HH-P-151F 4,3.1 Sampling for first article inspection. 4.3,l.l E. For the purpose of sampling, a lot shall consist of all packing of the same type and thickness produced under essentially the same conditions. 4,3.1,2 Sampling for examination. A random sample of rolls shall b
38、e selected from each lot of packing for the examination specified in 4.3.2 in accordance with MIL-STD-105 at inspection level TI. The acceptance quality level (AQL) shall be 2.5 percent defective. 4.3.1.3 Sa,mpling for tests. Samples of packing shall be selected from each lot in accordance with MIL-
39、STD-105, at inspection level L4, for the tests specified in 4.3.2. The AQL shall be 4 . O percent defective, Each sample piece shall be 12 by 12 inches, or 3 feet long by ordered width. 4.3.2 Examination. Each of the sample rolls selected in accordance with 4.3.1.2 shall be surface examined, measure
40、d and weighed to determine conformance with the requirements of this specification which do not require tests. Any roll in the sample containing one or more visual or dimensional defects shall not be offered for delivery, and if the number of defective rolls in any sample exceeds the acceptance numb
41、er for that sample, this shall be cause for rejection of the lot represented by the sample, 4.3.3 Tests. The samples selected in accordance with 4.3.1.3 shall be subjected to the tests specified in table I to determine conformance with this specification, If any of the samples tested is found not to
42、 be in conformance with this specification, this shall be cause for rejection of the entire lot. 4.4 Quality conformance inspection. Quality conformance inspection shall consist of the tests and examinations specified in table II. Test report data shall be recorded as specified in 6.4 and 6.4.1. TAB
43、LE II. Quality conformance inspection. Characteristic Fabric insert: Weight Breaking strength Tensile strength Ultimate elongation Accelerated aging Compression set Resistance to water Swelling Extraction Class 2 Class 4 Adhesive bond Rubber compound: Resistance to oils Requirement 3.4.1 3.4.2 3.5.1
44、 3.5.2 3.5.1.2 3*5*3 3.5.4 3.5.4.1 3.5.4.2 3.5.5 3.5.5.1 3.5.5.2 3.6 Test paragraph 4.5.1.1 4.5.1.2 4.5.2.1 4.5*2.2 4.5.2.3 4.5.2.4 4.5.2.5 4.5.2.5.1 4.5.2.5.2 4.5.2.6 4.5.2.6.1 4.5.2.6.2 4.5.3 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-HH-P-1
45、5LF 53 777777Y OOOY326 O HH-P-151F TABLE II. Quality conformance inspection. - Continued Characteristic Test paragraph Requirement Width 4.5.6 3.9 Workmanship 4.5.5 3.8 Thickness 4.5.4 3.7 4.4.1 Samplinp for quality conformance. 4.4.1.1 Lot. Unless otherwise specified (see 6.2.1), the lot shall be f
46、ormed in accordance with MIL-STD-105. 4.4.1.2 Sampling for inspection. Unless otherwise specified (see 6.2.1), the sample for inspection shall be taken in accordance with MIL-STD-105, inspection level II. The unit for inspection shall be a roll. 4.4.1.3 Sampling for test. 4.4.1.3.1 Packing. Unless o
47、therwise specified (see 6.2.1) , samples of packing shall be taken for tests in accordance with MIL-Sm-105. The lot size and number of samples shall be as specified in table III. I Number of units (rolls) in lot 1 to 2 3 to 5 6 to 10 11 to 20 21 to 40 41 to 80 81 and over TABLE III. Sampling for tes
48、ts. Acceptance number Rej ec t ion number Number of nonconforming) nonconforming) test units (test units (test units 1 2 1 8 1 O 6 1 O 5 1 O 4 1 O 3 1 O 2 1 O 4.4.1.3.2 Fabric. Unless otherwise specified (see 6.2.1) , the contractor shall furnish with each delivery of packing a piece of fabric 12 by
49、 24 inches taken from the lot of fabric used in the manufacture of the packing delivered. 4.4.2 Compliance criteria. 4.4.2.1 Inspection. Inspection requirements shall be as specified in 4.4.2.1.1 through 4.4.2.1.2. 4.4.2.1.1 Packing. Compliance of the lot with requirements for which inspection was made shall have an AQL of 2.5 percent defective when sampled in accordance with 4.4.1.2. 7 Provided by IHSNot for ResaleNo reproduction or networking permitted without lice
