... The 5 heat exchanger and condenser for seamless carbon steel pipe for ASTM A179, specifications: 3/ ... seamless steel pipe (heat pipe) DIN17175-1979: carbon structural steel, steel grade St35.8-St45.8 ... 20G, specifications: 6-720* 1-70mm Two, carbon steel welded steel pipe: 1 American Standard ERW ... in charge of export packaging: flat, chamfer, brush paint brush with cap, oil, steel, printing, binding, ...