Common methods for 3PE anti-corrosion steel pipe anti-corrosion:1. Pipeline anticorrosion generally adopts two main methods of external coating and cathodic protection.2. Although most of the surface of the pipeline is covered by the coating, a slight leak will cause an incredible corrosion rate, an

Welding equipment: ZX7-400-3 welding machine is used for root welding; Kumagai ZD-500 multifunctional steel pipeline automatic welding equipment is used for filling and covering.Welding material: Bole φ3.2 E6010 cellulose electrode is used for root welding; Lincoln E81T8-G φ2.0 flux-cored self-shiel

Anticorrosion of the inner wall of large-diameter steel pipes:1. Before processing all steel pipes, the steel plate on the inner wall side of the large-diameter steel pipe shall be de-rusted until the metal is exposed to metallic luster (whitening). It should meet the sa2.5 standard required in GB89

Cooling form of large diameter steel pipe:Large-diameter steel pipes are steel pipes with an outer diameter of 1000MM or more. Large-diameter seamless steel pipes are made of steel ingots or solid tube blanks that are perforated into capillaries, and then hot-rolled, cold-rolled, or cold-drawn.1. Ch

Stainless steel pipe is a hollow long strip of steel, which is widely used as a pipeline for transporting fluids, such as oil, natural gas, water, gas, steam, etc. Stainless steel pipes are lighter in weight when they have the same bending and torsional strength. They are widely used in the manufact

1. Indefinite length (usually length)The length of galvanized seamless pipes is generally different in length, which is called indefinite length within the range specified by the standard. Indeterminate length is also called normal length (pass length). For example, 159*4.5 galvanized seamless pipe

The weld seam of the spiral steel pipe is longer than that of the straight seam steel pipe. If the pipe length is L, the weld seam length is L/cos(θ). However, most of the defects of steel pipes are concentrated in the weld seam and the heat-affected zone. The long weld seam means that the probabili

(1) Raw materials are strip steel coils, welding wires, and fluxes. Before putting into use, they must go through strict physical and chemical tests.(2) The head-to-tail butt joint of strip steel adopts single-wire or double-wire submerged arc welding, and automatic submerged arc welding is used for

With the continuous development of my country's economy, the country vigorously develops the energy industry. Long-distance oil and gas pipelines are an important way of energy protection. During the anti-corrosion construction process of oil (gas) pipelines, the surface treatment of steel pipes is

1) The type, specification, and quality of stainless steel pipes, components, and welding materials must meet the design requirements and specifications.2) The positions of supports, hangers, and brackets should be correct, flat, and firm, and the backing plate in contact with the pipe should be mad