Comparison of The Advantages of Stainless Steel Welded Pipes And Seamless Steel Pipes

Now the production technology of stainless steel welded pipes is relatively complete, and has replaced seamless steel pipes in many aspects, such as petroleum, automobile, papermaking, air conditioning and other industries, and its price is about one-fifth cheaper than seamless pipes.

The market demand for seamless stainless steel pipes is mainly reflected in basic industries, among which the demand from petroleum, chemical industry, power generation, etc. accounts for one-third of the total consumption of seamless stainless steel pipes.

More producers choose stainless steel welded steel pipe in addition to its cheaper price, but also mainly by its own characteristics and advantages, mainly look at the following aspects:

Small diameter stainless steel welded pipe manufacturing process, the sequence is stainless steel plate, slitting, forming, dissolving, bright solution treatment, internal and external weld channel treatment, eddy current testing, laser calibration, straightening and storage.

Through the production process can be seen stainless steel welded pipe belongs to the continuous on-line production, the thicker the wall thickness, the higher the investment in the unit and dissolving equipment, the lower its economy and practicality. And the thinner the wall thickness, its input-output ratio will fall accordingly, in addition to the product process also affects its strengths and weaknesses, usually welded pipe with higher precision, wall thickness is more uniform, stainless steel pipe fittings with high brightness on the inside appearance (the surface brightness of the steel surface grade of the steel plate to determine the surface of the steel pipe), can be arbitrarily sized. So it is in the high precision, medium and low pressure fluid use to show its economy and aesthetics.

Seamless steel pipe manufacturing process sequence is smelting, ingot, rolling, sawing, peeling and piercing, annealing, pickling, ash, cold drawing, cutting head, pickling and final storage. In addition to the advantages of thick-walled, high-pressure, high-strength mechanical structures, ordinary seamless steel pipe has low precision, uneven wall thickness, low brightness on the inside appearance of the pipe, high cost of sizing, and it is not easy to remove the pockmarks and black spots on the inside appearance.

The following is a clearer comparison of the two, first of all, look at the summer cover range, stainless steel seamless pipe can be done in small diameter large wall thickness and large diameter large wall thickness, but generally subject to length limitations; but the stainless steel welded pipe wall thickness can be made thinner, can be done in large diameter small wall thickness and small diameter small wall thickness, theoretically stainless steel coils with a long, welded pipe can be done for more than a long time. In other words, the thicker the more suitable for the use of seamless pipe, the thinner the more suitable for the use of welded pipe.

The second is the average wall thickness and concentricity of the tube, in this regard, the stainless steel tube is better than the stainless steel seamless tube. Because of the cold rolled plate plate thickness tolerance is more average, the deformation in the forming process is average. Seamless tube rolling process by the precision of the equipment and other factors, with uneven thickness, concentricity of the problem, but the roundness is better than the welded pipe.