Threaded and coupling steel pipe Our company can provide you with threaded end steel pipe with standards of astm a53 a sch40 and bs1387 medium class, they are used for low pressure water pipe , welcome your enquiry. Appearance: black steel pipe or galvanized steel pipe Sizes : o. D.: from 1/2 inch to 4 inch wall thickness : according to astm a 53 sch40, bs1387 (medium class) and din 2444. Length: random