Spiral steel pipe welding seam disadvantages
NewsThe 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
NewsCan 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
UncategorizedSpiral 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
News1、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
NewsJudging 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
blog(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
UncategorizedSpiral 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…
Spiral steel pipe length several common measurement methods
UncategorizedAt present, the more common length of spiral steel pipe is 12 meters / branch, but there are many other lengths, in order to more accurately know the length of spiral steel pipe, the following are several common methods.
1, camera length…
Spiral steel pipe for insulation treatment of technical requirements
blogSpiral steel pipe insulation treatment after people are used to called insulation steel pipe, insulation steel pipe insulation layer is made of rigid polyurethane foam filling, for spiral steel pipe insulation quality requirements are as follows.
1.…
The role of elements in anti-corrosion steel pipe on high-temperature tempering brittleness
UncategorizedAnti-corrosion steel pipe triggers the high-temperature tempering brittleness of fine anti-corrosion steel pipe impurity elements such as phosphorus, tin, antimony, etc.. (2) in different forms, to varying degrees to promote or slow down the…