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There are several ways to connect galvanized steel pipes

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There are three connection methods for galvanized steel pipes:
1. Rolling groove connection
Roll groove weld cracking:
① Grind the welding bars on the inner wall of the pressure groove of the pipe mouth to reduce the resistance of the rolling groove;
②Adjust the axis of the steel pipe and the rolling grooving equipment, and require the steel pipe and the rolling grooving equipment to be level;
③Adjust the grooving speed. The grooving forming time should not exceed the specified time and force evenly and slowly.

Rolling groove steel pipe fracture:
① Grind the welding bars on the inner wall of the pressure groove of the steel pipe mouth to reduce the rolling groove resistance;
②Adjust the axis of the steel pipe and the rolling grooving equipment to ensure that the steel pipe and the rolling grooving equipment are level;
③Adjust the trough speed. The trough speed should not exceed the specified limit and apply force evenly and slowly;
④ Check the width and model of the support roller and pressure roller of the rolling grooving equipment to see if there is a mismatch in size between the two rollers causing bite;
⑤ Use a vernier caliper to check whether the groove of the steel pipe is specified.

The grooves rolled by the rolling groove machine should meet the following requirements:
①The surface from the pipe end to the groove section should be smooth, without unevenness or rolling marks;
② The center of the groove should be concentric with the pipe wall, the width and depth of the groove should meet the requirements, and check whether the clamp model is correct;
③ Apply lubricant to the rubber sealing ring and check whether the rubber sealing ring is damaged. Oil lubricant must not be used as lubricant.

2. Welding connection
① After the galvanized steel pipe is connected, the pipe ends are not in a straight line and the steel pipe has an oblique mouth problem. It is recommended to cut off a small section of the steel pipe head before processing;
② After the galvanized steel pipe is butted, the two pipes are not connected tightly, resulting in an uneven thickness of the welding joint, and the steel pipe has an elliptical pipe mouth due to its reasons or bumps during transportation. It is recommended to cut off a small section of the steel pipe head before reinstalling. carry out processing;
③After the galvanized steel pipe mouths are butted, blisters appear at the pipe mouth area, which is caused by technical reasons during welding;
④ There are zinc tumors at the pipe mouth, which causes welding difficulties and blisters. If the zinc tumors are too large or there are too many tubes, simple zinc tumor removal is required.

3. Threaded connection
① The thread buckle is buckled randomly: the pipe hoop and the thread buckle cannot fully contact or loosen, cut off the randomly buckled part, and reinstall the thread;
② The steel pipe thread and the pipe hoop thread do not match and cannot be connected. The pipe hoop should be replaced or the equipment should be adjusted to re-thread;
③The steel pipe is missing after threading: measure whether the wall thickness of the steel pipe can meet the standard thickness requirements of the threading pipe.

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