News
-
Fire steel pipe construction
(1) When the steel pipes of the fire hydrant water supply system adopt hot-dip galvanized steel pipes on the inner and outer walls, welding should not be used. When the system pipeline adopts a non-corrosive inner wall pipeline, it can be connected by welding, but the pipeline...Read more -
Steel structure maintenance and upkeep
1. Regular rust and anti-corrosion protection. Generally, the designed service life of steel structures is 50-70 years. During the use of steel structures, the chance of being damaged due to overload is very small. Most steel structure damage is caused by corrosion that reduce...Read more -
Things to note when purchasing straight seam steel pipes
First, purchasing needs to understand the types of steel pipes: 1. By type: straight seam steel pipe, seamless steel pipe, spiral steel pipe, etc. 2. Sectional shape classification of straight seam steel pipes: square pipe, rectangular pipe, elliptical pipe, flat elliptical pi...Read more -
Why are large-diameter steel pipe mostly welded with steel
1. The uses of large-diameter stainless steel can be divided into oil well pipes (casing, oil pipes drill pipes, etc.), pipeline pipes, boiler pipes, mechanical structural pipes, hydraulic support pipes, gas cylinder pipes, geological pipes, and chemical pipes (high-pressure f...Read more -
What is the difference between butt welding flange and flat welding flange
The butt-welded flange is that the pipe diameter and the wall thickness of the interface end are the same as the pipe to be welded, and it is welded just like two pipes. The flat welding flange is a concave platform that is slightly larger than the outer diameter of the pipe a...Read more -
Types and uses of welded steel pipes
1. Welded steel pipe for low-pressure fluid transportation is also called a general welded pipe, commonly known as clarinet. It is a welded steel pipe for conveying water, gas, air, oil and heating steam, and other generally lower pressure fluids and other purposes. 2. Galvani...Read more -
Basic requirements for the appearance of welds of straight seam steel pipes
1. The surface of the welding joint: A. Cracks, lack of fusion, pores, slag inclusion, and splashes are not allowed. B. The weld surface of pipes whose design temperature is lower than -29 degrees, stainless steel and alloy steel pipes with a greater tendency to hardening shal...Read more -
Comparison of steel pipe anticorrosive coating technology
Steel pipe anti-corrosion coating process 1: Due to the use of curtain coating, the coating film sags seriously. Besides, due to the unreasonable design of the roller table and chain, the coating film has two longitudinal and multiple circular scratches. This process is remove...Read more -
Five types of annealing methods in the steel pipe
1. Fully annealed Process: Heat the steel to 20~30℃ above Ac3, cool it slowly (with the furnace) after holding it for some time to obtain a heat treatment process (complete austenitization) close to the equilibrium structure. Complete annealing is mainly used for hypereutectoi...Read more