October 13, 2022
Connection of galvanized steel pipe: thread, welding.
Connecting by rolling groove
(1) Rolling groove weld cracking
1. The inner wall welding bars of the pressure groove part of the pipe mouth will be smoothed to reduce the rolling groove resistance.
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 pressure groove speed, pressure groove molding time can not exceed the specified, uniform, slow application of force.
(2) rolling channel steel pipe fracture
1. The inner wall welding bars of the pressure groove part of the steel pipe mouth are ground 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 pressure groove speed, pressure groove speed can not exceed the provisions, uniform, slow application of force.
4. Check the width and model of the support roller and the pressure roller of the roller groove equipment, whether there is a mismatch between the size of the two rollers and cause the occlusal phenomenon.
5. Check whether the groove of the steel pipe is specified with vernier calipers.
(3) Grooves formed by rolling machine shall meet the following requirements
1. The surface from the pipe end to the groove section should be smooth and smooth, without roll marks.
2. Groove center should be concentric with pipe wall, groove width and depth should meet the requirements, and check whether the type of clamp is correct.
3. Smear lubricant on the rubber sealing ring and check whether there is damage to the rubber sealing ring. The lubricant shall not use oil lubricant.
Welding type connection
1. The galvanized steel pipe is not in a straight line after the butt joint, and the steel pipe has the problem of diagonal opening. It is recommended to cut off a small section of the steel pipe head before processing.
2. After the butt joint of galvanized steel pipe, the butt joint of two pipes is not strict, resulting in uneven welding thickness; And steel pipe due to its own reasons or transportation knock, resulting in pipe mouth ellipse, it is recommended to cut off a small section of steel pipe head before processing.
3. After the butt joint of galvanized steel pipe, trachholes appear at the mouth of the pipe:
4. Due to technical reasons during welding.
5. There are zinc nodules at the mouth of the pipe, resulting in welding difficulties and trachoma problems. Simple removal of zinc nodules is carried out for too large and too many pipes.
Turn wire connection
1, wire buckle: pipe hoop and wire buckle can not fully contact, loose, cut off the disorderly buckle part, re-wire installation.
2. The steel pipe wire buckle and the pipe hoop wire buckle do not match and cannot be connected. The pipe hoop should be replaced or the equipment should be adjusted to turn the wire again.
3, steel pipe wire after printing: measuring whether the wall thickness of steel pipe can meet the standard thickness requirements of the wire pipe.
