... .API 5L good quality stainless steel pipe in China factory viewSteel pipe manufacturing process1. step2.step3.stepend producttechnical ... ,ST37,ST45.8,ST52,S235JR,STP40Packaging:painting black, pipe cap, steel strips bundled.Applications:Petroleum;construction;shipbuilding; ... ISO9001:2000 strictly.1. Spiral pipe2. Steel pipe3. Pipe making machinery4. Stainless steel pipes fitting5. Seamless steel pipe6 ...