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Spiral steel pipe production process
(1) The raw materials are steel strip coil, welding wire, and flux. They must undergo strict physical and chemical inspections before being put into use. (2) For the head-to-tail butt joint of the steel strip, single-wire or double-wire submerged arc welding is used. After being rolled into a spi...Read more -
What are the physical properties of seamless tubes?
What are the physical properties of seamless tubes? 1. Composition of chemicals. There are specifications for the amount of dangerous chemical elements like As, Sn, Sb, Bi, and Pb as well as gases like N, H, and O. To enhance the consistency and purity of steel’s chemical composition, decre...Read more -
Submerged arc steel pipe acceptance steps
1. Inspection and inspection of submerged arc steel pipes shall be carried out by the supplier’s technical supervision department. 2. The supplier must ensure that the delivered submerged arc steel pipes comply with the regulations of the corresponding product standards. The purchaser has the rig...Read more -
ASTM A53 Seamless tubing
ASTM A53—Uncoated and hot-dip galvanized welded and seamless nominal steel pipe There are two types of seamless tubing: DIN and ASTM American standard seamless steel tube. German seamless steel tube standard, or JIS Japanese seamless steel tube that complies with GB standards. While ASTM America...Read more -
Rust removal technology for large-diameter spiral steel pipes
The surface of spiral steel pipe is mainly polished with wire brush, etc. Cleaning and preheating of large-diameter spiral steel pipes can remove loose or floating scales, rust, welding slag, etc. The rust removal ability of hand tools can reach the Sa2 level, while the rust removal ability of po...Read more -
API 5CT oil casing pipe hydrostatic pressure test
The hydrostatic pressure test is a crucial step in the manufacturing and production process of steel pipes. Its purpose is to find out how resistant the steel pipe is to leaks under typical test pressure and pressure stabilization time. It is a crucial method of examining the general quality of s...Read more