Mastery of Tianjin Steel Trade Co., Ltd. specializes in the supply of various types of spiral pipe, pipe, seamless tube, reasonable price and stock. Within welding and outside welding Lincoln welding machine for single or double wire submerged arc welding, thereby obtaining a stable welding quality. After welding the weld line ultrasonic injury instrument checks, Sichuan spiral, to ensure 100% coverage of non-destructive testing spiral weld. If defects, automatic alarm and spraying tags, production workers and so at any time adjusting the process parameters, and remove defects. Mastery of Tianjin Steel Trade Co., Ltd. specializes in the supply of various types of spiral pipe, pipe, seamless tube, reasonable price and stock. Coil outer diameter of about 30 nm, inner diameter of about 10 nm, large diameter spiral pipe adjacent helical pitch of about 11 nm. 1 week of each spiral from 6 surrounded nucleosome, H1 histone in the spiral cavity of the inner surface of the maintenance of spiral structure plays an important role. The nucleosome composed of 10 nm 30 nm fiber to form spiral of crude fiber, so that further compression 6 times the length of DNA. Spiral mainly for oil and gas pipelines, coiled tubing, and its specifications diameter * wall thickness represents. There spiral welding and double-sided welding, pipe should ensure hydrostatic testing, tensile strength and cold bending properties of the weld to be in compliance. Mastery of Tianjin Steel Trade Co., Ltd. specializes in the supply of various types of spiral pipe, pipe, seamless tube, spiral pipe specifications, reasonable price, stock. How to increase the stability of spiral steel pipe spiral steel products storage space or warehouse, should be selected in clean, smooth drainage area, away from harmful gases or dust in factories and mines. The presence on the ground to remove weeds and all sorts of things, to keep the steel clean. Thick-walled spiral pipe, accessible VAI (online consultation), Sichuan spiral from the Tianjin Steel Trade Co., Ltd. Mastery. Mastery of Tianjin Steel Trade Co., Ltd. (www.tjtdgl.com) (www.tdglgt.com) Shandong Liaocheng, steel leaders, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer demand. Mastery Steel Union leaders in the staff warmly welcome all inquiries negotiations to create accessible VAI better future.