... 2.WT: 3~30mm 3.ISO Standard,API certificate astm structural seamless steel pipe SpecificationOD 33mm - 406mm(1”~16”) with thickness of ... etc.b. JIS Standard10#(STPG38,STS38,STB30,STB33,Stb35), 20#(STPG42,STB42,STS42,JIS S20C),45#(JIS S45C), 16mn( ... 16mn(ASTM A210-C) etc.Usage Appilcation boiler use,water transport, building, machinery, traffic, aviation, oil development etc. seamless pipe for low ...