| This product is made by being combined with H.S.S 51#(S.K.H), which is material verified by new manufacture method and technical development, and carbon steel, heat-treated under special vacuum, ground completely on the external surface, screwed, and then ground on the entire screw part : so this product not only conforms to the international standard because the combination angle between pipe taper male screw and female screw as well as the screw angle is exact but can also completely intercept high pressure such as water, air, and steam after construction. |
