There are three ways to connect
galvanized steel pipes:
1. Rolling groove connection
Cracking of rolling groove welds: ① Smooth the inner wall welding rib of the pressure groove part of the nozzle to reduce the rolling groove resistance; ② Adjust the axis of the steel pipe and the rolling groove equipment, and require the steel pipe and the rolling groove equipment to be level; ③ Adjust the pressure groove speed, the forming time of the groove cannot exceed the specified time, and the force should be applied evenly and slowly.
Fracture of rolling grooved steel pipe: ① Smooth the welding rib on the inner wall of the pressure groove part of the steel pipe nozzle to reduce the rolling groove resistance; ② Adjust the axis of the steel pipe and the rolling groove equipment, and require the steel pipe and the rolling groove equipment to be level; ③ Adjust the pressure groove speed, pressure The groove speed should not exceed the regulations, and the force should be applied evenly and slowly; ④ Check the width and model of the support roller and the pressure roller of the grooving equipment, whether there is a bite phenomenon caused by the mismatch of the sizes of the two rollers; ⑤ Use a vernier caliper to check whether the groove of the steel pipe is Regulation.
The groove formed by the rolling groove machine should meet the following requirements: ① The surface from the pipe end to the groove section should be flat without unevenness and no rolling marks; ② The center of the groove should be concentric with the pipe wall, and the width and depth of the groove should meet the requirements, and check whether the model of the clamp is correct; ③ Apply lubricant on the rubber sealing ring and check whether the rubber sealing ring is damaged. The lubricant must not be an oil lubricant.
2. Welding connection
①After the galvanized steel pipe nozzle is connected, it is not in a straight line and the steel pipe has an oblique opening. It is recommended to cut off a small section of the pipe head before processing; ②After the galvanized steel pipe nozzle is connected, the two nozzles are not tightly connected. , resulting in an uneven thickness of the weld, and the steel pipe is oval due to its reasons or transportation bumps. It is recommended to cut off a small section of the pipe head before processing; ③ After the galvanized steel pipe is butted, the nozzle appears Trachoma, which is caused by technical reasons during welding; ④ There are zinc nodules at the nozzle, which cause welding difficulties and trachoma problems. Simple zinc nodule removal treatment should be carried out for excessive zinc nodules and excessive tubes.
3. Car wire connection
①The screw is screwed randomly: the pipe hoop and the screw can not be completely contacted or loosened, cut off the part of the screw, and re-install the thread; ②The steel pipe screw does not match the screw of the pipe hoop and cannot be connected, and the pipe hoop should be replaced or the equipment should be adjusted. Re-threading; ③ Missing printing after threading the steel pipe: measure whether the wall thickness of the steel pipe can meet the standard thickness of the threading pipe.
