ASME B31.1A-2008 pdf free download.Power Piping.
(0.1.1) When the largest size to be joined (within the BPS) is 4 in. NPS or smaller, the test assembly shall be the same NPS as the largest size to be joined.
(0.1.2) When the largest size to be joined within the BPS is greater than 4 in. NPS, the test assembly shall be made of piping components either 4 in. NPS or a minimum of 25% of the N PS of the largest piping component to be oined, whichever is larger.
(0.2) The test assembly shall be subjected to one of the following qualification test operations.
(0.2.1) When the test assembly has been cured. it shall be subjected to a hydrostatic pressure test of the maximum of either 150 psig or 1.5 times an equivalent allowable pressure which shall be calculated using the least nominal wall thickness and outside diameter of the pipe in the test assembly. This pressure shall be determined using the equation in para. 111-2.2.2(A) for the test material. The test shall be conducted so that the joint is loaded in both the circumferential and longitudinal directions. Joints shall not leak or separate when tested.
(D.2.2) When a test assembly is joined by heat fusion, the fusion joints may be tested by cutting a minimum of three coupons containing the joint and bending the strips using a procedure which shall be defined in the BPS. As a minimum requirement, the test strips shall not break when bent a minimum of 90 deg. at ambient temperature, over an inside bend radius of 1.5 times the nominal diameter of the tested pipe.
(E) Performance Requahficatkm
(E.1) Renewal of a bonding performance qualification is required when
(E.1.1) a bonder or bonding operator has not used the specific bonding process for a period of time greater than 6 months, or a specific maximum period of time otherwise permitted in the BPS for the work
(E.L2) there is a specific reason to question a bonder or bonding operator’s ability to make bonds that meet the BPS
(E.2) Renewal of a bonding performance qualification for a specific bonding process may be made in only a single test assembly.
(F) Qualification Records. An erector using bonders, or bonder operators, shall maintain a record of the procedures used and of operators employed by him who are qualified in these procedures.
111-5.13 Thermoplastic Joints
(A) Solvt’nt-Cemenfrd Joints
(A.l) Preparation. PVC and CPVC surfaces to be cemented shall be cleaned by wiping with a clean cloth moistened with acetone or methylethyl ketone. Cleaning for ABS shall conform to ASTM D 2235. Cuts shall be free of burrs and circumferential cuts shall be as square as those obtained by the use of a saw with a miter box or a square-end sawing vise. A slight interference fit between the pipe and a fitting socket is preferred, and the diametral clearance between a pipe and the entrance of a mating socket shall not exceed 0.04 in. This fit shall be checked before solvent cementing.
(.4.2) Procedure. Joints shall be made in accordance with a qualified BPS. ASTM D 2855 provides a suitable basis for such a procedure. Solvent cements for PVC, CI’VC, and ABS shall conform to ASTM D2564, D 2846. and 02235, respectively. Cement shall be applied to both joint surfaces.