How to improve the qualification rate of pipe grooving



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Due to improper operation, improper tools and other reasons, unqualified grooves often appear during the grooving process. 


1.Inaccurate groove depth : Too deep will damage the galvanized layer and various coatings of pipes; Too shallow will cause the clamp can not enter the groove sufficiently, affecting the quality of the joint. It is recommended to use a roll grooving machine with limit device. 


2.Pipe damage: Grooving is a method that has a small impact on the pipe, but improper operation can damage the pipe's coating and lining.


3. The flare is out of specification : It is inevitable that flare happens during grooving, as long as the flare is within the tolerance, it is acceptable. However, if the flare is out of specification, it will affect the follow-up pipe connections.



How to improve the qualification rate of grooving 


1.Strictly follow the procedures of the roll grooving machine. Before construction,  detailed technical disclosure, training is helpful relevant person to master construction technology .


2. Use a reliable roll grooving machine. The roll grooving machine must be equipped with limit device, and it is recommended to use a brand roll grooving machine with guaranteed quality. 

The operating procedures of the roll grooving machine


1. Check the workpiece: The pipe end should be flat without burrs, and the welded pipes inner should be smoothed.


2. Inspect the equipment: Check whether the power supply meets the requirements to prevent motor from damage. Check whether the hydraulic oil is sufficient, notice the machine will not work properly if there is not enough oil inside.

3. Place the pipe: Put one end of the pipe on the down wheel of the machine, and the other end on the pipe support, the pipe support should be placed at 2/3 of the total length of the pipe. then adjust the height of pipe support to horizontal or 1 degree lower.

4. Adjust groove depth: Tighten the relief valve, shake the oil pump handle, make the upper roller downward and touch the pipe surface. Then turn the limit nut down, let it contact the oil pump surface, check the groove depth on the nameplate table, and rotate limit nut to the appropriate scale, then fix it with fastening nut.

5. Grooving operation: Plug the power, start the roll grooving machine, and slowly shake the handle of the oil pump to start groove. When the limit nut contacts the oil pump surface, allow the pipe to rotate additional one or two turns to make sure groove is completed , then turn off the switch.


6. Measure groove depth: Release the relief valve, remove the pipe, and measure the groove depth with a PI ruler.

The above are the tips for improving the qualification rate of grooving, Zhejiang Victaulic Tuwei   Piping Equipment Co., Ltd. is a professional manufacturer of pipe tools,we have various models of the roll grooving machine, pipe cutting machine, hole cutting machine, pipe threading machine for you to choose. If you have any needs or doubts about pipe tools, welcome to contact us.


How to improve the qualification rate of grooving ,The operating procedures of the roll grooving machine