GOST 20295-85 K52 Steel Pipes

GOST 20295-85 K52 Steel Pipes Tube.Straight seam welded pipes, pipes made of hot-rolled or cold-rolled steel plates or steel strips welded by straight seam welding on welding equipment are called straight seam welded pipes. (It is named because the welding part of the Steel Pipe is in a straight line.) The Welded Steel Pipe should be subjected to mechanical property test, flattening test and flaring test, and must meet the requirements of the standard. The steel pipe should be able to withstand a certain internal pressure, and if necessary, a 2.5Mpa pressure test should be carried out to maintain no leakage for one minute. The eddy current testing method is allowed to replace the hydrostatic test. The eddy current flaw detection method is to fix the probe on the frame, keep a distance of 3-5mm from the flaw detection and the weld seam, and conduct a comprehensive scan of the weld seam by the rapid movement of the steel pipe. The flaw detection signal is automatically processed and sorted by the eddy current flaw detector. To achieve the purpose of flaw detection. After flaw detection, the welded pipe is cut to the specified length with a flying saw, and then goes off the assembly line through the overturn frame. Both ends of the steel pipe should be chamfered with flat heads, printed with marks, and the finished pipe should be bundled and packed in hexagons before leaving the factory.

1. The main production process of hot-rolled Seamless Steel Pipe (main inspection process):
Tube blank preparation and inspection→tube blank heating→piercing→tube rolling→steel reheating→fixed (reduced) diameter→heat treatment △→finished tube straightening→finishing→inspection (non-destructive, physical and chemical, Taiwan inspection)→warehousing
2. The main production process of cold-rolled (drawn) Seamless Steel Pipes:
Billet preparation→pickling lubrication→cold rolling (drawing)→heat treatment→straightening→finishing→inspection

Our products aye widely used in water engineering,petrochemical industry,chemical industry,electric power industry,agricultural irrigation,urban construction.

Used for liquid conveying:water supply and drainage.For gas transport:gas,steam,liquefier petroleum gas.

For structural use:as pile pipe,as a bridge;Pipes for wharves,roads and building structures.

Q: Are you a manufacturer?
A: Yes , we are a seamless steel pipe  manufacturer, We have own factory, which is located in Shandong,China. We have a leading power in producing and exporting hot rolled seamless steel pipe,cold rolled seamless steel pipe,cold drawn seamless steel pipe and Alloy Seamless Steel Pipe etc. We promise that we are what you are looking for. 
Q:Can we visit your factory ?
A:Warmly welcome once we have your schedule we will pick you up .
Q: Do you have quality control?
A: Yes, we can accept BV, SGS third inspection .
Q: Can you arrange the shipment?
A: Sure, we have permanent freight forwarder who can gain the best price from most ship company and offer professional service.
Q: How long is your delivery time?
A: Generally it is 7-14 days if the goods are in stock. or it is 25-35 days if the goods are not in stock, it is according to quantity.
Q:How can we get the offer?
A:Please offer the specification of the product,such as material,size,shape,etc.So we can give the best offer.
Q:Can we get the some samples?Any charges?
A:Yes,you can get available samples in our stock.Free for real samples,but customers need to pay the freight cost.
Q: How do you make our business long-term and good relationship ?
A: 1.We keep good quality and competitive price to ensure our customers' benefit.
2.We respect every customer as our friend and we sincerely do business and make friends with them, no matter where they come from.