... /T3091-2001, BS1378-1985, ASTM A53, EN5. Usage: used for low pressure liquids conveyance, such as water, gas, and construction6. Out Diameter ... endPressure test: The forming of the pipe by water pressure test, pressure test tube capacityX-ray: tube weld test whether the ... petroleum, coal gas, natural gas, heating power stations, high-pressure hydropower stations and more. The quality of our products is ...