API Spec 15LR:2001(R2018) pdf download.Specification For Low Pressure Fiberglass Line Pipe and Fittings
5.7.3 Cyclic or Static Pressure Test
a. Using the cyclic test data or static test data and regression analysis as developed for the pipe, following ASTM D 2992, Procedure A or B, construct a regression line converting the stress (or strain) versus cycle data or stress (or strain) versus time data to pressure versus cycle or time data for pipe of the intended pressure class. b. For cyclic pressure tests, the gauge pressure at the peak pressure of the cycle shall be not less than 1 1 / 2 nor more than 2 times the pressure rating of the fitting. The cycle amplitude pressure shall be at least 80% of the selected peak pressure. c. For static pressure tests, the gage pressure shall be no less than 2 1 / 2 times and no more than 2 3 / 4 times the fitting static pressure rating. d. Test each component specimen as required above with unrestrained ends in accordance with Test Methods of ASTM D 2143 for cyclic tests and ASTM D 1598 for static tests, at a test temperature of 150°F. For components which are to be used at higher temperatures, the higher temperature shall be used. e. The number of cycles or hours to failure for the compo- nent must be no less than that predicted by the HDB line lower 95% prediction limits of the corresponding pipe.
5.7.4 Degree of Cure
All fittings, couplings and connections tested in accor- dance with 5.7 after the effective date of this Seventh Edition of API Spec 15LR shall have DSC data on each sample in accordance with Appendix B.
6.1.5 Retests
If any test specimen of the tests specifically mentioned in 5.2.1, 6.1 and 6.2 fails to conform to the specified require- ments, the manufacturer may elect to reject the entire lot or make retests on two additional lengths from the same lot. If both of the retest specimens conform to the requirements, all of the lengths in the lot shall be accepted, except the length from which the initial specimen was taken. If one or both of the retest specimens fail to conform to the specified require- ments, the manufacturer may elect to test individually the remaining lengths in the lot, in which case determinations are required only for the particular requirements with which the specimens failed to comply in the preceding test.