ASTM A795 is the standard for black and hot-dipped zinc-coated (galvanized) and welded steel pipes designed for fire protection specification by the American Society for Testing and Materials. This type of piping is suitable for mechanical and pressure applications as well as for the general use of steam, water, air and gas piping.
Although the pipe can be bent, it is not at ambient temperature, because the inside diameter of the elbow is less than 12 times the outside diameter of the elbow. The steel shall require for the specified chemical composition. Every section of the pipe should be hydraulically tested and no leakage through the wall. As a choice of the hydrostatic test, each pipe shall be tested by a non-destructive electrical method if accepted by the buyer. Finally, according to the requirements of resistance welded pipe and furnace welded pipe, the pipe is compressed.