Analysis of steel pipe straight seam welding technology and testing after welding

First, analysis of steel pipe straight seam welding technology

1. Performance: Grouting pipe has good waterproof performance and can effectively prevent water leakage.

2. Durability: Grouting pipe has a long service life and will not corrode during long-term use.

3. Corrosion resistance: Because it contains polymer materials and additives, its acid and alkali resistance are relatively high.

4. Strong wear resistance: Strong wear resistance can reduce mechanical wear.

5. Safety and reliability: Because it is made of high-strength steel or alloy steel, the structure is firm and stable and not easy to rust.

6. High impact strength: Grouting pipe is made by special technology, with a compact and firm structure, not easy to deform and crack.

7. Convenient and simple construction: Grouting pipe processing accuracy is not high, easy to install, simple, and quick to operate.

Second, testing after welding of steel pipe

Testing after straight seam welding of steel pipe is the basic principle of acoustic detection pipe for pile foundation engineering. When the steel pipe is welded straight, the joint is completed under a certain pressure and temperature; when the steel plate cools to room temperature, the joint will shrink naturally and then return to its original state. Since the friction caused by the joint shrinkage is very small, it is difficult to detect. Therefore, to increase the inspection speed, the two-point bending method is usually used to measure the length of the steel pipe, and the diameter of the steel pipe is calculated by the formula.

The following points should be noted when inspecting after the steel pipe is welded straight:

1. Be sure to test the compressive strength of the pile concrete before installation.

2. Complete the joint under high pressure

1) Do not pile a lot of stones or cement blocks on the joint.

2) Only authorized certificates can be used.

3) Inspection and acceptance personnel must be professionally trained.

4) Conduct quality inspection.

5) After leaving the factory, the product must be packaged in strict accordance with the specifications