A Pipe might or may not meet both API 5L Gr.B and also A53 Gr.B and also often they can be interchangeable.similar with API 5L Grade B, ASTM A53 can be smooth or ERW Welded, covered in ASTM A53 Type E or type S. WLD steel supply several qualities of light carbon steel pipe consisting of API 5L grade B, ASTM A53 and so forth. As a leading pipeline supplier, we are not just able to provide the pipe