Mastery of Tianjin Steel Trade Co., Ltd. specializes in the supply of various types of spiral pipe, pipe, seamless tube, spiral pipe pieces, the price is reasonable, the cash supply. Density test: storage of liquid or gas welding container, thick-walled spiral pipe, which is not dense weld defects such as penetrating cracks, pores, slag, incomplete penetration and loose tissue, etc., can be found in the dense test . Compactness test methods are: kerosene trial, ballast water test, water will test. Mastery of Tianjin Steel Trade Co., Ltd. specializes in the supply of various types of spiral pipe, pipe, seamless tube, reasonable price and stock. Before forming the strip after flattening, cutting, trimming, planing, surface transport and to clean up the crimping process. Using electrical contacts on both sides of pressure control conveyor cylinder pressure, q345b spiral, to ensure the smooth delivery of the strip. Using external control or internal control roller shape. Weld gap control device to ensure that the weld gap to meet the welding requirements, diameter, misalignment and weld gap have been strictly controlled. Mastery of Tianjin Steel Trade Co., Ltd. specializes in the supply of various types of spiral pipe, pipe, seamless tube, reasonable price and stock. Strength test pressure vessels: pressure vessels, in addition to sealing test, the Hunan spiral, but also for the strength test. There are two common pressure test and pressure test. They can be tested in working under pressure vessels and piping welds compactness. Pressure test is more sensitive than the hydrostatic test and speed, while after the test product without waste water treatment, drainage problems for the product is particularly applicable. But the risk is greater than the test pressure test. When tested, it must comply with the appropriate safety measures to prevent accidents during the test. Coiled tubing, Hunan spiral, accessible from the Tianjin Steel Union Steel Union Co., Ltd. Mastery. Mastery of Tianjin Steel Trade Co., Ltd. (www.tjtdgl.com) (www.tdglgt.com) strong, credible, Liaocheng in Shandong steel industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving access innovative ideas will lead VAI into the brilliant and you work for a better future!