Document om63JZaJXEK0ONvdDEeak1KMD

Designation: C 296 - 76 AMERICAN SOCIETY FOR TESTING AND MATERIALS 1916 Race St., Philadelphia. Pa. 19103 Reprinted from the Annual Book of ASTM Standards, Copyright ASTM If not listed in the current combined index, will appear in the next edition. Standard Specification for ASBESTOS-CEMENT PRESSURE PIPE*1 i his Standard is issued under the Cued designation C 296; the number immediate!} following the designation indicates the year of original adoption or. in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. This specification Has been approvedfor use by agencies of the Department of Defense andfor listing in ike DoD Index of Specifications and Standards. 1. Scope 1.1 This specification covers asbestoscement pressure pipe for use in supply lines and distribution systems that carry water under pressure. The specification also covers asbe stos-cement pressure pipe for use in sewer force mains which carry sewage under pres sure. 2. Applicable Documents 2.1 ASTM Standards: C 500 Testing Asbestos-Cement Pipe1 D 1869" Specification for Rubber Rings for Asbestos-Cement Pipe.* 3. Classification ^J.l Asbestos-cement pipe furnished under ^^specification shall be manufactured in the ^essure class designations of Classes 100. 150. and 200. The pressure class designations shall mean that the pipe is intended for water service at operating pressures corresponding to the class designation under the conditions of in stallation and operation encountered in many water distribution systems. Note I--The purchaser should determine for him self the proper class of pipe to be used under the installation and operating conditions that will exist on the project on which the pipe is to be used. For this purpose, reference can be made to AWWA H2, Standard Practice for the Selection of AsbestosCement Water Pipe. 3.2 The types of pipe shall be known as Type I and Type II corresponding to the chemical requirements in Section 10 of this specification. Note 2--To assist the purchaser in choosing the type of pipe most suitable for his use, guidelines for the definition of aggressiveness of water and of soil environments for selection of the proper type of asbestos-cement pipe are covered in Section 19 to 25 ' of Methods C 500. 4. Definitions 4.1 pipe--asbestos-cement pressure pipe as defined in Sections I, 3, and 5. 4.2 coupling--a section for joining asbes tos-cement pipe that, when properly installed with the proper accessories, develops a joint equivalent in strength- and serviceability to the pipe sections. 4.3 purchaser--the actual purchaser of the pipe or his authorized agents acting within the scope of the duties entrusted to them. 4.4 lot--a lot as used herein for pipe 21 in. in diameter and smaller is defined as each 300 lengths of pipe or less, of identical class and size manufactured on each machine during a 24-h period. A lot as used herein for pipe larger than 21 in. in diameter is defined as each 300 lengths of pipe or less, of identical class and size manufactured on each machine dur ing a period of consecutive working days not exceeding 7 days. 5. Manufacture 5.1 Asbestos-cement pressure pipe shall be 1 This specification is under the jurisdiction of ASTM Committee C-17 on Asbestos-Cement Products. Current edition approved May 28, 1976. Published July 1976. Originally published as C 2% - 32. Last previous edition C 296 - 73b. 1Annual Book of ASTM Standards, Part 16. I CTD000230 C 296 composed of an intimate mixture of portland cement or portland blast-furnace slag cement and asbestos fiber with or without silica; or it shall be composed of pOrtlandpozzolan cement and asbestos fiber. The mix ture shall be free of organic additives. The ma terial shall be of laminar construction formed under pressure to a homogeneous structure and cured to meet the physical and chemical requirements of this specification. 6. Rubber Rings 6.1 The rubber rings used to seal the joints of the asbestos-cement pipe shall conform to the requirements of the latest revision of Speci fication D 1869. 7. Hydrostatic Strength 7.1 Each standard, random or short length of pipe (Section 12) and each coupling sleeve, when manufactured from the same material as the pipe, shall be hydrostatically tested by the manufacturer prior to shipment and shall have sufficient strength to withstand the internal hydrostatic pressure prescribed in Table I. when tested in accordance with Section S of Methods C 500. 7.2 From each lot which has passed the routine hydrostatic proof test, one length shall be selected by the inspector. Each selected length shall be hydrostatically tested in accord ance with Section 5 of Method C 500 to a pressure of four times the rated working pres sure for the class of pipe, maintaining such pressure for not less than 5 s. The pipe shall not fail under this pressure. Each pipe so tested shall be retested in accordance with 7.1 of this specification. 8. Flexural Strength 8.1 Each length of pipe in sizes 4, 6, and 8 in. (102, 152, and 203 mm) shall have suffi cient flexural strength to withstand, without failure, the total load prescribed in Table 2, when tested in accordance with Section 8 of Methods C 500. 9. Crushing Strength 9.1 When specifically requested by the pur chaser in his order, crushing tests shall be conducted before shipment at the purchaser's expense. A one-foot length of pipe for each lot cut from an unmachined portion of the pipe shall have sufficient strength to resist the mini mum crushing load prescribed in Table 3, when tested in accordance with Section 11.1.1 of Methods C 500. 10. Chemical Requirements 10.1 When uncombined calcium hydroxide tests are requested, one sample shall be taken from each lot of pipe and tested in accordance with Sections 14 through 18 of Methods C 500 Sample to be tested may be taken from one of the specimens selected for the crushing test. The amount of uncombined calcium hydroxide shall not exceed 1.0 % for Type II pipe. Note 3--There are no chemical requirements for Type I pipe. 11. Sampling 11.1 All pipe and couplings tested under this specification shall be in a normal air-dried condition. 12. Sizes and Dimensions 12.1 Couplings and coupling areas of pipe shall be machined or otherwise finished to such dimensions as will provide tight joints when assembled with proper accessories and put into service for which the pipe is intended. 12.2 Pipe shall be manufactured with nomi nal inside diameters of 4. 6, 8, 10, 12, 14, 16. 18. 20. 24, 30, and 36 in. (102, 152, 203, 254.A 304, 356, 406,457, 508, 610, 762, and 914 mm) W in Classes 100, 150, and 200 as defined in Section 3. The average diameters of standard and random lengths may be less than the nominal by not more than 5.0 percent, when measured approximately 3 in. (76.2 mm) from the end. 12.3 The standard length shall be 13 ft I in. (3960 25 mm). Alternative lengths shall be 10 ft I in. (3050 25 mm) for 4 and 6-in. (102 and 203-mm) pipe and 16 ft I in. (4880 25 mm) for 14-in. (356-mm) and larger pipe At least 85 percent of the total footage of pipe of any one class, type, and size, excluding short lengths, shall be furnished in standard lengths. The remaining 15 percent may be in random lengths of not less than 7 ft. (2.13 m). Short lengths, when specifically ordered, shall not exceed 6 ft. 9 in. (2.06 m). 2 CTD000231 13. Workmanship and Finish 13.1 Machined ends of the pipe that receive coupling shall be free of dents and gouges t will affect the tightness of the joint. 13.2 Each pipe shall be free of bulges, dents, and tears in the inside surface that result in a variation in diameter of more than in. (4.8 mm) from that obtained on adjacent unaffected portions of the surface. 13.3 Each length of pipe shall not vary in straightness by more than 0.05 in./ft (0.004 mm/m) of length when the variation is mea sured in accordance with Section 13 of Meth ods C 500. 14. Marking and Shipping 14.1 Each standard and random length of pipe shall be marked by the manufacturer with the trade name, nominal size, class, hydro static proof pressure, and date of manufacture. Each coupling sleeve, if made of the same material as the pipe, shall be marked by the manufacturer with the nominal size, class, and the letter "T" to indicate that it has been hydrostatically tested. 14.2 Pipe and couplings shall be prepared for commercial shipment so as to ensure acceptance by common or other carriers. 15. Inspection and Rejection 15.1 All material furnished under this specition shall conform to the requirements Sited herein and shall be subjected to the factory inspection and tests prescribed in this specification. When requested by the purchaser in his order, the manufacturer shall notify the purchaser of the time that the inspection and testing will take place so that the purchaser may arrange for witnessing such tests and inspections at his own expense. Instead of such inspection, when requested, the manufacturer shall be prepared to certify that his product conforms to the requirements of this specifica tion. 15.2 Each pipe and coupling shall be in spected by the manufacturer, before shipment, for compliance with the standards for dimen sions, tolerances, and workmanship and finish (see also Section 11). 15.3 Failure of any specimen tested for crushing strength to withstand 75 percent of the load specified in Section 8 shall be cause for rejection of the lot from which the test specimen was taken. When any specimen tested for crushing strength withstands over 75 percent but under 100 percent of the load specified in Section 9, one specimen shall be cut from each of two additional pipes of the same lot. Failure of either of these additional specimens to meet the strength requirements of Section 9 shall be cause for rejection of the entire lot from which the original sample was taken. 15.4 If any pipe subjected to the hydrostatic test described in Section 5 of Methods C 500 fails to withstand the higher pressure specified in 7.2, two additional lengths of the same size and class shall be selected from the pipe manufactured during the same shift and shall be subjected to the higher hydrostatic test. The failure of one of these additional lengths to withstand the specified pressure shall be cause for rejection of the entire lot of that size and class manufactured during the same shift as the test lengths. 15.5 If the results of the uncombined cal cium hydroxide test show that the sample failed to meet the specification requirements, two additional specimens shall be selected and sampled for test. The failure of one of these two additional samples to meet the specifica tion requirements of Section 8 shall be cause for rejection of the lot. CTD000232 TABLE I Applied Hydrostatic Proof Presorts Class Applied Pressure, psi (MPa) 100 350 (2.4) 150 525 (3.6) 200 700 (4.8) C 296 TABLE 2 Applied Flexors! Proof Loads Nominal Total Applied Load. Ibf (kN) size.------------------------------------------------------------ in. (mm) Class 100 Class 150 Class 200 4(101.6) 6(152.4) 8 (203.2 ) 1200(5.3) 1470(6.6) 2800(12.5 ) 3700(16.5) 5330(25.9 ) 7600(33.8) I 870 (8.4) 4 900(21.8) 10 130(45.1) TABLE 2 MMbmi Cnisfctaf Loads Nominal Size. in. (mm) Crushing Strength per Lineal Foot. IbHkN/m) Class 100 Class 150 Class 200 4(102) 6(152) 8 (203) 10(254) 4 100(59.8) 4 000 (58.4) 4 000 (58.4) 4 400 (64.2) 5 400 (78.8) 5 400 (78.8) 5 500(80.2) 7 000(102.1) 8 700 (126.9 j 9 000(131 3) 9 300(135.8) II 000(160.5) 12(304) 14(356) 16(406) IS (457) 5 200(75.8) 5 200 (75.8) 5 800(84.6) 6 500(94.8) 7 600(110.8) 8 600(125.5) 9 200(134.2) 10 100(147.4) II 800(172.3) 13 500(197.1) 15 400(224.8) 17 400(254.0) 20(50S) 7 100(103.6) 24 (610) 8 100(118.2) 30(762) 9 700(141.5) 36 (914) )l 200(163.4) 10 900(159.0) 12 700(185.3) 15 900(231.9) 19 600 (285.9) 19 400(283.2) 22 600(329.9) 28 400(414.6) 33 800(493.5) APPENDIX Al. ADDITIONAL INFORMATION Al l It is suggested to the purchaser, without being made a part of this specification, that the purchaser may request inclusion of the following information in his order or agreement for purchase of the pipe: Al.i.l Any tests, in addition to those prescribed by this specification, as the special circumstances may require. A 1.1.2 The place or places where any additional tests arc to be made. A1. 1.3 Description of the additional testing (acui ties, ALIA Who shall bear the expense of such addi tional tests. A 1.1.5 Whether such additional tests may be made by any sound sampling process or other method approved by the parties, and A 1.1.6 Such other matters as the parties may find desirable to include in their v ritten agreement. The American Societyfor Testing and Materials takes no position respecting the validity ofany patent rights asserted in connection with any item mentioned in this standard. Users ofthis standard are expressly advised that determination of the validity ofany such patent rights, and the risk ofinfringement ofsuch rights, is entirely their own responsibility. CTD000233 'I