Usine chinoise API5L X42 grade B chaudière sans soudure en acier au carbone laminé à chaud tube chaudière tuyau en acier tuyau de chaudière prix pour chaudière
1.Black varnish painted or oil painted, 2PE.3PE on the surface.
2.Plain,square cut or beveling ene by caps.
3.In hexagon or triangle buddle with steel strips.
4.Other as the customer's requires.