This specification covers the design, construction, testing and operating requirements for pressure-reducing manifolds for air or nitrogen systems, which constitute the combination of all components and piping between, and including, the inlet and outlet ports. The manufactured manifolds shall perform satisfactorily to the following procedures: visual examination; hydrostatic shell test; relief-valve lift test; seat tightness test; and external leakage test.

1.1 This specification covers the design, construction, testing and operating requirements for pressure-reducing manifolds for air or nitrogen systems, referred to herein also as manifolds. The term manifold constitutes the combination of all components and piping between, and including, the inlet and outlet ports (see Fig. 1 and Fig. 2).

1.2 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses (metric SI units) are for information only.