Malleable Iron Pipe Fitting Steel Nipples 1.Size:1/8-6" 2.StandardBS, ... ,electric galv,baked galv,black PackingCartons, woven bags, wooden boxes Quality ControlQulified raw material ,test chemical composotion every funace during production ... pressure test machine,Electric Annealing Furnace CertificateISO9001 UsageSuitable for joining pipe lines convey steam, gas, oil, air