What are the connection methods of galvanized steel pipe?
Release time:
2023-01-19
Check the width and type of the support roller and pressure roller of the grooving equipment, and check whether there is any bite phenomenon caused by the size mismatch between the two rollers.
Roll groove connection
(1) Roll groove weld cracking
1. Grind the welding ribs on the inner wall of the grooved part of the nozzle to reduce the resistance of the rolling groove.
2. Adjust the axis of steel pipe and rolling groove equipment, and require the level of steel pipe and rolling groove equipment.
3. Adjust the speed of the grooving, the forming time of the grooving should not exceed the specified time, and the force should be applied evenly and slowly.
(2) Roll groove steel pipe fracture
1. Grind the welding ribs on the inner wall of the steel pipe nozzle pressure groove to reduce the resistance of the rolling groove.
2. Adjust the axis of the steel pipe and the rolling groove equipment to require the level of the steel pipe and the rolling groove equipment.
3. Adjust the speed of the groove, the speed of the groove cannot exceed the specified, and the force is applied evenly and slowly.
4. Check the width and type of the support roller and pressure roller of the grooving equipment, and check whether there is any bite phenomenon caused by the size mismatch between the two rollers.
5. Use a vernier caliper to check whether the groove of the steel pipe is specified.
(3) The groove formed by rolling groove machine should meet the following requirements
1. The surface from the pipe end to the groove section should be smooth without unevenness and 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 type of the clamp is correct.
3. Apply lubricant to the rubber sealing ring and check whether the rubber sealing ring is damaged. The lubricant must not be oil lubricant.
Solder connection
1. After the butt joint of the galvanized steel pipe, the nozzle is not in a straight line and there is a problem with the bevel of the steel pipe. It is recommended to cut off a small section of the steel pipe head before processing.
2. After the nozzles of galvanized steel pipes are docked, the two nozzles are not connected strictly, resulting in uneven thickness of the welded joints; and the steel pipes are oval due to their own reasons or transportation bumps. It is recommended to cut off a small section of the steel pipe head. Then process it.
3. After the nozzle of the galvanized steel pipe is butted, sand holes appear in the nozzle part:
4. Due to technical reasons during welding.
5. There are zinc bumps at the nozzle, which cause welding difficulties and trachoma problems. If the zinc bumps are too large and there are too many tubes, simple zinc bump removal treatment is performed.
Wired connection
1. Disorderly fastening of threaded buckles: The pipe hoop and the threaded buckle cannot be completely contacted and loosened.
2. The thread of the steel pipe does not match the thread of the pipe hoop and cannot be connected. The pipe hoop should be replaced or the equipment should be re-threaded.
3. Leakage after steel pipe threading: measure whether the wall thickness of the steel pipe can meet the standard thickness requirements of the threaded pipe
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