Для подумать.
Есть такой документ ASME-PCC2, см. пункт е и еще будет интересна часть 5 этого документа с аппендиксами.
Буржуи крайне осторожно относятся к пневматике, особенно для эксплуатировавшегося оборудования.
215-6 PRESSURE TESTING
(a) The requirement for the applicability of a pressure
test subsequent to weld repairs shall be evaluated.
(b) If a pressure test is determined to be required after
the repair welding of pressure-bearing parts is completed,
the pressure vessel or vessel part should be pressure
tested in accordance with the requirements of the applicable
construction code. If the applicable construction
code has no such pressure test requirements, Article
501 should be followed.
(c) The pressure test, when required, shall be
performed at a temperature higher than the fracture
appearance transition temperature (FATT) and at or
above the minimum temperature specified by the applicable
construction code, to prevent brittle fracture during
the pressure test.
(d) The toughness value of degraded materials shall be
evaluated based on accumulated material database or
samples obtained from vessel parts.
(e) For pressure vessels that operate in hydrogen
service and are to be hydrotested, the hydrotest pressure
shall be evaluated in consideration of hydrogen service
conditions and shall be no higher than the vessel operating
pressure.
(f) When a pressure test is to be carried out, consideration
shall be given to the pressure train that the pressure
vessel is located in, the possibility of isolation of components
within that train, and the need for pressure testing
the entire train.
