Appearance how to test the quality of spiral steel pipe

Many users buy spiral steel pipe, due to the lack of professional testing equipment, this time only from the appearance of the quality of spiral steel pipe detection, the following are several common methods of determination. 1, from the…

Analysis of the degree of turning of spiral steel pipe

Longitudinal welded pipe consumption process is simple, high consumption efficiency, low cost, the development of faster. The strength of spiral welded pipe is generally higher than that of straight seam welded pipe, and it can use narrower…

Spiral steel pipe in the production of attention to matters

Spiral steel pipe in the process of making spiral welded pipe, the following issues need to be noted. 1, oiling and marking: the spiral steel pipe in the inspection of qualified oiling operation to prevent corrosion, and marking according…

Spiral steel pipe welding seam disadvantages

The small length of the filler weld is 50mm. if the direction of the shortcoming on the base material of the steel pipe, the filler weld should be along the circumferential direction. Patch welding seam should be repaired and ground, so that…

The role of spiral steel pipe and the main use of items

Can say that related to the previous 10 years spiral steel tube industry, 14 years spiral steel tube industry is a dismal year, whether from the number of acquisitions, or from the price, a drop to low, the financial crisis erupted in 2008 than…

The production process of spiral steel pipe plant

Spiral steel pipe is a spiral steel pipe welded by active double-wire double-sided submerged arc welding process with strip steel coil as raw material, kneading and forming at regular temperature. The production process is as follows: raw materials,…

Spiral steel pipe surface rust removal treatment has several methods

1、Cleaning Apply solvents and emulsions to clean the exterior of steel to remove oil, grease, dust, slick and similar organic substances, but it cannot remove rust, oxidation skin, welding powder, etc. on the exterior of steel, so it is…

The appearance quality inspection method of spiral steel pipe

Judging from the surface, that is, in the appearance of the inspection. Usually users in the purchase of spiral steel pipe, due to the absence of professional testing equipment, at this time can only use the naked eye on the quality of spiral…

Spiral steel pipe process

(1) Raw materials, i.e. strip coil, welding wire, flux. Before input are subject to strict physical and chemical inspection. (2) Strip head and tail butt, using single or double wire submerged arc welding, and automatic submerged arc welding…

Spiral steel pipe raw material is strip or coil are hot rolled plate

Spiral steel pipe raw material for strip or coil are hot rolled plate. Spiral steel pipe raw materials Hot-rolled plate, that is, hot-rolled steel rolled steel plate or strip, commonly known as hot plate, usually also rolled written as…