2023-01-30

1. The use of large-diameter straight seam welded steel pipes can be divided into oil well pipes (casing pipes, oil pipes and drill pipes, etc.), pipeline pipes, boiler pipes, mechanical structure pipes, hydraulic prop pipes, gas cylinder pipes, geological pipes, chemical pipes (high-pressure Fertil

2023-01-14

Routine maintenance is required when thick-walled steel pipes are used:Thick-walled steel pipes are widely used steel varieties. It directly affects the economic benefit and personnel's life. All countries in the world attach great importance to the inspection of thick-walled steel pipes and adopt v

2023-01-11

The main technical characteristics of spiral steel pipe:During the forming process of the spiral steel pipe, the steel plate is uniformly deformed, the residual stress is small, and there is no scratch on the surface. The processed spiral steel pipe has greater flexibility in the range of diameter a

2023-01-09

What they have in common is that they all belong to inner and outer plastic-coated steel pipes, but fire-fighting plastic-coated steel pipes are only one category of inner and outer plastic-coated steel pipes.We are already familiar with the plastic-coated composite steel pipe inside and outside. Wi

2023-01-06

Introduction of anti-corrosion on 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 derusted until the metal is exposed to metallic luster (whitening). It should meet the sa2.5 standard

2023-01-03

The length of steel pipes used for pipelines, but for the convenience of users, when the steel pipes sold at any time are reserved for production, the Q235A spiral steel pipes are produced within the specified length of the steel pipes, but when the actual order is made, the steel pipes of standard

2022-12-29

To solve the problem of excessive misalignment in the alignment of spiral steel pipe nozzles, the following preventive measures should be taken in quality management control:1. Try to use the internal alignment device.2. Do a good job in engineering measurement and trimming when assembling.3. When t

2022-12-26

(1) During the extrusion process, the temperature of the inner lining of the spiral steel pipe increases continuously with the extrusion process. At the end of the extrusion, the temperature of the inner wall of the inner lining near the extrusion die is higher, reaching 631 °C. The temperature of t

2022-12-21

1. Impact toughness of large-diameter steel pipe: The load acting on the machine part at a high speed is called impact load, and the ability of the metal to resist damage under the action of impact load is called impact toughness.2. Strength of large-diameter steel pipe: Strength refers to the perfo

2022-12-19

Thin-wall stainless steel pipe socket argon arc welding construction method has the following characteristics:1. The welding process does not require welding consumables (replaced by the expanded pipe edge). The steel pipe is inserted into the pipe fitting socket. The socket end is welded in a circl