Welded steel pipe Description
Welded steel pipe Description
1、It is welded by steel plate or steel strip after being crimped and formed by the unit and mold. Different welding methods can be divided into straight seam welded pipe and spiral welded pipe.
2、Seam pipe is made of precise cold-rolled sheet. These cold-rolled sheets usually have a maximum wall thickness difference of 0.002 inches. The steel plate is cut to a width of πd, where d is the outer diameter of the pipe. The tolerance of the wall thickness of the slotted pipe is very small, and the wall thickness is very uniform throughout the circumference. The steel pipe has high precision, uniform wall thickness, high brightness inside and outside the pipe (the surface brightness of the steel pipe is determined by the surface grade of the steel plate), can be arbitrarily fixed length, and can be used as a thin-walled pipe.
- 3、due to differences in material chemical composition. The steel for the production of seamed pipes contains a chemical composition suitable for welding. For example, the mixing of elements such as silicon, sulfur, manganese, oxygen, and triangular ferrite in a certain proportion can produce a weld melt that is easy to transfer heat during the welding process, so that the entire weld can be penetrated.
- Welded steel pipe application
With its good surface effect, it is commonly used in decorative pipes, prop pipes, and product pipes. Its pressure-bearing performance is general, mainly used for conveying water, oil, gas, air, and heating hot water or steam and other generally lower pressure fluids.
Comparison of welded pipe and seamless pipe
1、Welded pipes are typically more cost effective than their seamless equivalents.
2、Welded pipes are usually more readily available than seamless. The longer lead time required for seamless pipes can not only make timing problematic, but it also allows more time for the price of the materials to fluctuate.
3、The wall thickness of welded pipes is generally more consistent than that of seamless pipes.
4、The internal surface of welded tubes can be checked before manufacturing, which isn’t possible with seamless
5、Seamless pipes provide peace of mind. Although there should be no issues with the seams of welded pipes supplied by reputable manufacturers, seamless pipes prevent any possibility of a weak seam.
6、Seamless pipes have better ovality or roundness, than welded pipes.
Welded steel pipe Specification
|Welded steel pipe
OD 6mm-630mm or customized Thick：0.4-30mm or customized; Width:10-1500mm Customized
RONSCO,BAOSTEEL, JISCO, TISCO, etc.
430.410.440.904Lect. Or Customized
GB, AISI, ASTM, ASME, EN, BS, DIN, JIS
2B.NO.1.,NO.3,NO.4,HL,BA,8K,Matte, Satin,Gold Titanium Or customized;
Foodstuff, Gas, metallurgy, biology, electron, chemical, petroleum,
Standard export sea-worthy packing or customized
3-15 days after deposit
we could offer the sample for free charge but do not pay the cost of freight.
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Our steel products are mainly used in chemical industry, petrochemical industry, offshore, seawater pipeline, desalination plant, nuclear engineering, paper and pulp industry.
Our export country
We are a well known worldwide supply and export industrial pipe in following countries：,Italy, Philippines, France，Ireland, Portugal, Gambia, Thailand, Ukraine, United Kingdom, Netherlands, South Africa, Spain, Turkey, Libya, Romania, Puerto Rico, Azerbaijan, United Arab Emirates, Pakistan, Ghana, Slovakia, Germany, Saudi Arabia, Afghanistan, Bolivia, Switzerland, Bangladesh, Taiwan, Oman, Egypt, Greece, Norway, Singapore, Bulgaria, Estonia, Belgium, Yemen, Hong Kong, Ecuador, Sri Lanka, Nepal, Belarus, Finland, Gabon, Iran, Canada, Argentina, Lebanon.