... so on.we can also produce according to drawingSpecification standardsANSI B16.9, ANSI B16.28, JIS B2311, DIN 2605, 2615, 2616, and 2617, ... Sch5-Sch160,XXS,XS,STD STANDARDS: ISO. ANSI. JIS. DIN GB/T12459,GB/T13401,ASME B16.91 USE: Petroleum, chemical, power, gas ... Sch5-Sch160,XXS,XS,STD STANDARDS: ISO. ANSI. JIS. DIN. GB/T12459,GB/T13401,ASME B16.9 USE: Petroleum, chemical, power, gas, metallurgy ...