Spiral piling welded pipe plasma cutting

As hot-rolled coil of material performance and production technical process, the domestic manufacturers meet the standard of the manufacturer, which is less than the steel manufacturers, on the other hand their production processes and quality level of its market price is also higher than the heat rolled steel plate. This is spiral piling pipe market price higher than the Longitudinal main reason. For the composition of steel selling prices, material prices is the dominant or even the decisive factor.

Longitudinal spiral welded pipe and carefully examine the price difference, spiral welded pipe Longitudinal slightly higher price is due to production of the main material of the price difference. However, steel production, only the project of a part, if taking into account the overall project quality, project cost and other factors, spiral welded pipe still has the overall advantage.

Production cut length tube length than the usual rate of finished pipe larger decline, production companies proposed fare increase is reasonable. The rate of increase of the enterprise are not consistent, the base price is generally based on the increase of about 10%. Usual length length length should be within the scope of the requirements of the contract is a fixed length dimension. But the actual operation is definitely cut out cut lengths is unlikely, so the standard cut length requirements for the allowable positive deviation values. If the standard deviation is no double length and cutting margin requirement, by agreement between the manufacturer and indicated in the contract. Times as long as the length scale of the same length, will give producers to bring a significant reduction in finished product rate, so manufacturers proposed fare increase is justified, the increase in the rate of price increases with the length of the same length.

Plasma cutting workpiece process will produce a large number of metal vapor, ozone, nitrogen oxides, soot, will seriously pollute the surrounding environment. The key to solve the problem is how to smoke the entire plasma dust sucked into the dust removal equipment, thus preventing air pollution. For spiral welded pipe plasma cutting, dust difficulty is:
1, the plasma gun nozzle cutting the air blown simultaneously to two opposite directions, so that the smoke coming out from both ends of the spiral pipe, spiral pipe is mounted on the suction port in one direction is very difficult to recycle dust .
2, the external cold air inlet gap from outside into the suction machine and a large amount of wind, so that the spiral steel pipe smoke and dust inhalation of cold air is greater than the total amount of the effective air volume, thus cutting soot absorption becomes completely impossible.
3, due to the cutting area far from the dust intake to reach the entrance of the wind sucked hard twitching soot.