... 304L,316/316L,etc. 3.Application:petroleum,Chemical,ect 4 Inch Stainless Steel Pipe FittingType: Reducing elbow, Long radius ... marckets in China,and it is very near to Shanghai.specification: NameStainless Steel Pipe Fitting StandardGB/T12459, GB/T13401 ... and Black zp,ChromedSurfaceSurface: 2B, BA, 8K, HL, No.1, No.4, Golden 8K, Black 8K etc.ApplicationPetrochemical industry, chemical fertilizer ...