... L etc We are specialized in producing and selling seamless stainless steel pipes, which are widely used in boiler, heat exchanger ... , we can also provide super clean (BA) pipes and fittings, the inside roughness can be controlled ... 321/H, 347H, 317/317L, 310S (2520), duplex steel (S31803/S32205), etc. We have experienced engeering team, ... products for our clients. TP316/316L Stainless Steel Pipes