China suppliers of Q235 Q345 ASTM carbon ERW mild iron round welded steel pipes

Short Description:

Welded steel pipe, also known as welded pipe, is a steel pipe made of steel plate or strip steel after crimping and welding, generally 6 meters. Welded steel pipe production process is simple, high production efficiency, variety specifications, less equipment investment, but the general strength is lower than seamless steel pipe.

Small diameter welded pipe adopts straight seam welding, large diameter welded pipe adopts spiral welding. According to the shape of the end of the steel pipe, it is divided into circular welded pipe and special-shaped (square, rectangular, etc.) welded pipe; According to different materials and uses, it is divided into welding steel pipes for mining fluid transportation, galvanized welded steel pipes for low pressure fluid transportation, and electric welded steel pipes for belt conveyor rollers. According to the specification and size table in the current national standard, the external diameter * wall thickness is sorted from small to large.

Product Detail

Product Tags




Commonly used welded pipe materials are: Q235A, Q235C, Q235B, 16Mn, 20#, Q345, L245, L290, X42, X46, X60, X80, 0Cr13, 1Cr17, 00Cr19Ni11, 1Cr18Ni9, 0Cr18Ni11Nb, etc.

The billet used for welding steel pipe is steel plate or strip steel, which is divided into furnace welded pipe, electric welding (resistance welding) pipe and automatic arc welding pipe because of its different welding process. Because of its different welding forms are divided into straight seam welded pipe and spiral welded pipe two kinds. Because of the shape of its end, it is divided into circular welded pipes and special-shaped (square, flat, etc.) welded pipes.




Product Name
China suppliers of Q235 Q345 ASTM carbon ERW mild iron round welded steel pipes
1-12 m or according to customers' requirements
7-10 days 
30% despoit in advance,70% after recepit of B/L copy.100% L/C is available. 

Production Process





about us

Shandong Kungang Metal Technology Co., Ltd. is one of the leading steel manufacturers and exporters in the Asian steel industry. Its business covers the whole world. Our main products include stainless steel plate, stainless steel plate, steel plate, steel bar, copper cathode, galvanized sheet, galvanized steel coil, lead plate, copper cathode, which are exported to Europe, America, South America, Africa, Asia, Middle East and Australia. We have our own factories, and we have also established cooperative relationships with related steel manufacturers to get more technical support, so that our company can perfectly meet customer requirements, such as TISCO, Baosteel, LISCO, JISCO, ZPSS, JISCO, LISCO, Maanshan Iron and Steel, Wuhan Iron and Steel, Anshan Iron and Steel, etc.

We have a strict system of quality control, SGS testing or other third party testing is welcome. Our products are in great demand both at domestic and abroad by virtue of excellent product quality and competitive price. Our products are widely used in the field of tableware, kitchen ware, medical apparatus and instruments, household appliances, auto parts, construction and decoration, petrochemical industry etc. Our company has rich experience in R&D and export of metal and steel materials. Our Company is just the long term reliable steel supplier you are looking for!



Our factory has multiple production lines, with a monthly output of several thousand tons. At the same time, cutting and cutting equipment can be cut flat.

Spot wholesale guarantee product quality intimate service

The company's technical force, the processing equipment of processing technology, diverse processing methods, can provide users with aluminum plate shear cleaning ruler processing, aluminum bands longitudinal partial processing,  thickness in aluminum alloy Panel sawtage ruler processing, aluminum plate surface covering processing, etc., to meet the needs of users with small batches, multi -varieties, multi -specifications, and multi -purpose needs

Real materials and real materials are uniform performance stable performance.

Have a lot of stocks, product quality assurance.

Refinery for many years of industry experience is worthy of your trust


Standard Export Package, Ensure the High Quality Delivery.

Packaging Details: Standard seaworthy packing(plastic&wooden) or according to the customer's requests
Delivery Detail: 3-10days, mainly decided by the quantity of the order
Port: Tianjing/Shanghai
shipping Sea ship by container


Q1:Can I get samples before order ?
A:Yes, of course. Usually our samples are free,we can produce by your samples or technical drawings.
Q2:Can I go to your factory to visit?
A:Of course, we welcome customers from all over the world to visit our factory.
Q3:What product information do I need to provide?
A:You need to provide the grade, length, width, diameter, thickness, coating and the number of tons you need to purchase.
Q4:Does the product have quality inspection before loading?
A:Of course, all our products are strictly tested for quality before packaging, and unqualified products will be destroyed.we accept  third party inspection.
Q5:How do we trust your company?
A:We specialise in steel business for years , headquarter locates in Jinan, Shandong province, you are welcome to investigate in any ways, by all means, we have CE and ISO certificate, quality can be guaranteed, the most important point is that we ship enough weight as per the order.



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