ERW Steel Pipe

    Quenching with water as quenchant, called water quenching. The advantage is in high temperature (550 ℃ ~ 650 ℃) cooling faster, the disadvantage is that the low temperature (200 ℃ ~ 300 ℃) also cooling faster, easy to cause greater stress on the organization. Water quenching is the high temperature objects into the water, and then burning red, and then into the water, so repeatedly, can improve the rigidity.     The principle of water quenching is to melt the molten material at about 1400 ℃ with a stream of water under a pressure so as to cause a total amount of solidification and solidification and fragmentation into fine particles so that the glass structure of the molten material is fixed down, stop the recovery of calcium fluorophosphate crystals. Fluorine and phosphorus content in the melt higher and higher alkalinity, fluorophafide crystal recovery faster, so the water quenching pressure will be higher; the other, combined fluorine and phosphorus lower an...

    Steel pipe market has improved in the new year of 2018. We can have an analysis from trading volume increasing and demand. It is obvious that we should have a new market plan for various steel pipes, such as seamless steel pipe, SSAW steel pipe too.     First of all, with the new year plan’s taking out, lots of engineering project would be here and thus the dominant orientation of large diameter straight welded pipe steel would be required. So that SSAW steel pipe would be here for customers.     What’s more, the steel trade business would be carry out in the whole world. Under this situation, there is no doubt that to improve the further development of large diameter thick wall welded steel market and other sizes of steel pipe would be another trend for the steel pipe market.     With new year’s coming, new market goal would be carry out step by step and what we need to do is just follow our step of production and doing the best job for...

    Steel pipe, whether seamless steel pipe, ERW steel pipe, SSAW steel pipe, is big and not so easy to move. So there is a big trouble: how to deal with the delivery and shipment for this kind of good when exporting.     So for delivery and shipment of steel pipe, there are some notes for them.     First of all, we should figure out that all steel pipes are shipped at buyer's risk. Under this situation, clients would be feel relieved.     Secondly, before the carrier's delivery receipt is signed, you should make sure that shipments should be carefully checked upon delivery just in case some mistake.     Thirdly, if there is any loss or damage which is evident, clients should make an appropriate notation on the delivery receipt and insist that the carrier's driver initial such exception.     http://www.xysteelpipe.com/info/Steel-pipe-delivery-and-shipping-advice-899-1.htm

    Carbon seamless steel pipe is generally in the automatic production of rolling pipe unit. The solid blank is inspected and removed from the surface defects, cut into the required length, in the tube end of the perforation end of the centering, and then sent to the heating in furnace, perforation in the punch.continue to rotate and move when perforation, in the role of the roll and the head, the tube gradually formed within the cavity, called the capillary. And then sent to the automatic rolling machine to continue rolling. And finally by the whole machine are the whole wall thickness, by sizing machine diameter, to specifications. The use of continuous rolling mill production of hot-rolled seamless steel pipe is a more advanced method.     If you want to get smaller and better quality of seamless tubes, it must be cold-rolled, cold drawn or a combination of the two methods. Cold rolling is usually carried out on a two-roll mill, in which the steel pipe is roll...

    The higher the pressure of the transmission medium, the thicker the thickness of the pipe, the pipe material requirements are generally higher.     Medium pressure above 1.6MPa, the choice of seamless steel pipe or non-ferrous metal pipe. High pressure, such as ammonia, urea and methanol production, and some pipe media pressure up to 32MPa, the general choice of materials for the 20 steel or 15MnV high-pressure seamless steel pipe. In the vacuum equipment on the tube and the pressure is greater than 10MPa when the oxygen pipe, generally use brass and brass.     Medium pressure below 1.6MPa, may consider the use of welded steel pipe, cast iron pipe or non-metallic pipe. But the cast iron pipe to withstand the pressure of the medium shall not be greater than 1.0MPa. Non-metallic pipe can withstand the medium pressure, and non-metallic materials, such as hard PVC pipe, the use of pressure is less than or equal to 1.6MPa; reinforced polypropylene pipe,...