... .ISO9000,ISO9001,ABS... Hebei Gee Pipe Mill Co.,Ltd is a leading manufacturer and exporter of the steel fittings and steel pipes, mainly ... including elbows, tees, reducers, flanges, forged fittings, ERW, LSAW, SSAW... Typecarbon steel pipe fittingsSize1 ... process are made under the ISO9001:2000 strictly. carbon steel pipe fittings