which standard can be used for non-metal inclusion of P22 steel piping
which standard can be used for non-metal inclusion of P22 steel piping
(OP)
there is no requirement for non-metal inclusion in ASTM A335,But I think P22 steel pipe should have some restriction of non-metal inclusion . If I want to put some restriction on technical specification of P22 steel pipe , what is reference standard I can use ?
P22 steel piping is used for main steam piping of thermal power plant .
P22 steel piping is used for main steam piping of thermal power plant .





RE: which standard can be used for non-metal inclusion of P22 steel piping
RE: which standard can be used for non-metal inclusion of P22 steel piping
UT testing is also a good alternative. It will catch the larger non-metallics
RE: which standard can be used for non-metal inclusion of P22 steel piping
Why would one drive unnecessary cost into specifying any supplemental tests for non-metallic inclusions when this grade of piping supplied under SA 335 has been successfully used in the Power Generation sector for years and years? Your weak links are still welds, not seamless base material made to this specification.
RE: which standard can be used for non-metal inclusion of P22 steel piping
But I think UT test in A335 is mandatory, so there is no need to do more
The reason for I want to put some restrict oninclusion is that mechanical property is not stabled and some experts don't satisfy mechanical property of pipe manufactured by this plant.They suggest controlling non metal inclusion.
RE: which standard can be used for non-metal inclusion of P22 steel piping
Look for another pipe supplier if they cannot produce pipe to the SA 335 material specification. There is no reason to go down the path for controlling non-metallic inclusions for reputable mills that supply this common grade of seamless pipe.
RE: which standard can be used for non-metal inclusion of P22 steel piping
But we need to consider the price, that is why we still choose them as supplier.