Connection Moda of Galvanized Steel Pipe

Galvanized steel pipe connection mode: thread, welding

Problem solving methods to edit

Firstly, rolling groove connection

(a) roll groove weld cracking:

1. The nozzle pressure of the tank welding steel grinding flat part of the wall, decrease the drag of channeling.

2. Adjust the axis of carbon steel pipe with channeling device, and ask the steel tube and channeling device level.

3. Adjust the speed of pressure tank, pressing forming time can't more than rules, and slow work.

(2) the roll channel steel tube rupture:

Part 1. The steel pipe pressure of the tank wall welded steel smooth, reduce channeling resistance.

2. Adjust the axis of steel tube with channeling device, steel pipe and channeling device level.

3. Adjust the speed of pressure tank, pressure tank can not exceed the prescribed speed, even and slow work.

4. Check the channeling device of the width of the supporting roller and pressure roller and model, the existence of two roll size does not match and cause occlusion phenomenon.

5. Use vernier caliper to check steel tube groove are rules.

(3) the roll forming of the roll groove machine groove shall meet the following requirements:

1. The mild steel pipe to the groove section of roll surface should be smooth without concave and convex, without mark.

2. In groove of the circle should be one of the wall, groove width, depth should comply with the requirements, and check the band model is correct.

3. The daub on the rubber seal lubricants and check for damage, rubber seal lubricants shall not adopt any lubricant oil.

Second, the welded connection

1. Galvanized steel pipe and pipe butt, not in a straight line and problems of bevel steel pipe, steel tube head of recommendations will be removed again after a short moment.

2. The two tubes after galvanized steel pipe butt butt lax phenomenon, lead to joint its thickness is not uniform; And steel pipe caused by itself or carrying knock against, nozzle ellipse, steel tube head of recommendations will be removed again after a short moment.

3. Galvanized coating steel pipe butt, mouth parts appear sand holes:

4. When the welding due to technical reasons.

5. Nozzle is zinc lump, welding difficulties and sand holes problem, the zinc tumor is too large, too much tube for simple zinc tumor removal.

Thirdly, car wire connection

Thread disorderly buckle: pipe hoop, loose contact with thread is not completely removed disorderly buckle parts, car wire installation again.

2. Steel pipe thread and coupling thread is not match, unable to connect, a coupling should be replaced or adjust the equipment to the car.

3. The steel tube car after the silk printing: measurement of steel tube wall thickness can reach the standard car wire tube thickness requirements

More information,pls visit:Hunan Great Steel Pipe Co.,ltd