SAE Flange Welding Couplings
According to SAE J518/ISO6162
Material Specification:
Material used for flange welding coupling is indicated with suffix as follow:
1.Flange and welding head are all carbon steel:without suffix.
2.Carbon steel flange and stainless steel AISI304 welding head: with the suffix ST/SS
3.Carbon steel flange and stainless steel AISI316L welding head: with the suffix ST/SU
4.Flange and welding head are all stainless steel:
AISI304 with the suffix-SS AIS316L with the suffix-SU
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