Straight Seam Welded Pipe

Your Professional Straight Seam Welded Pipe Supplier

Our goal is to become your true partner in the field of straight seam welded pipe in China. GNEE Group has more than 2,000 professional staff. With high quality steel pipes and professional services, GNEE Group has won the recognition and support of customers at home and abroad in the industries and has become a globally renowned steel pipe supply group. Our company is committed to applying advanced manufacturing technology and strict quality control standards to every product. The price is competitive and the product is quality-assured, which is a good choice for your long-term cooperation.

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Why Choose Us

Production market

GNEE Group exports steel to more than 160 countries including Thailand, Vietnam, South Korea, the United States, Chile, the United Kingdom, Saudi Arabia, the United Arab Emirates and Canada.

Our certification

The company has passed ISO9001, SGS, CE and other certifications.

Quality control

GNEE Group is committed to providing high-quality products to global customers. From the signing of the contract, from raw material procurement, production to inspection, the entire process is strictly in accordance with national standards such as ASTM, ASME, JIS, EN, DIN, etc.

Our service

The company has a professional sales team to provide you with high-quality pre-sales consulting services. During the order production process, customers can communicate with us at any time to understand the production progress. At the same time, we provide high-quality after-sales service to meet the different needs of customers.

Advantages of Straight Seam Welded Pipe

Low production cost

The production cost of straight seam welded pipe is relatively low. Compared with other pipes, the production process is simple, the production efficiency is high, and the production cost is low.

High strength

The strength of straight seam welded pipe is relatively high. This is because the welds of straight seam welded pipe are welded along the length of the pipe, and this welding method can make the strength of the pipe more uniform.

High dimensional accuracy

The dimensional accuracy of straight seam welded pipe is relatively high. During the production process, the size can be adjusted according to the needs, so as to ensure the dimensional accuracy of the pipe.

A252 GR2 Nominal Wall Cylindrical Steel Pipe Piles

A wide range of applications

The application range of straight seam welded pipe is very wide. It can be used to convey various liquids, gases and solid materials, such as water, oil, gas, powder, etc. At the same time, it can also be used in construction, machinery, automobiles, ships and other fields.

Easy to process and install

Straight seam welded pipe is easy to process and install. In the production process, cutting, bending, punching and other processing can be carried out according to the needs, so as to meet different usage needs.

Environmental protection and energy saving

The production process of straight seam welded pipe is relatively environmentally friendly and energy-saving, because its production process does not require a lot of energy and resources, and does not generate a lot of waste water, waste gas and waste residue.

Standard and Steel Grade

Standard	Steel Grade
API SPEC 5L	Gr.B, X42, X46, X52, X56, X60, X65, X70, PSL1 / PSL2
ASTM A252	GR.1, GR.2, GR.3
ASTM A53 /ASTM A500	GR.A, GR.B
ASTM A671 / ASTM A672	CA55, CB60, CB65, CB70, CC60, CC65, CC70
EN10219 / EN10217	S235JR/J0/J2, 275JR/J0/J2S, S355JR/J0/J2/J2G3/G4
AS/NZ 1163 / AS/NZS 1579	C250, C350, C350L0
JIS G3444 / JIS G3457	STK290, STK400, TK500, STK540, STPG370, STPG410
DIN17100	ST37, ST44, ST52
GB/T 9711-2023	L245, L290, L320, L360, L390, L415, L450, L485, L555
GB/T 3091	Q195, Q215, Q235, Q355
ISO 3183	L245, L290, L360, L415, L485
GOST 20295	K34, K38, K42, K50, K52, K55, K60
EN 10210	S235JRH, S275J0H, S355J2H, S355NH, S420NH
SY/T 5037	Q235B, Q355B

Application of Straight Seam Welded Pipe

One of the main applications of straight seam welded pipes is the construction industry. These pipes are an important part of the construction of high-rise buildings, bridges, and other types of infrastructure. Straight seam welded pipes are usually used to transport natural gas, oil, water and other fluids.

Another important application of straight seam welded pipes is in cargo transportation. They are used in the manufacture of trucks, railroads, ships and pipelines, among other things. Straight seam welded pipes are also widely used in the manufacturing industry. They are used in the production of various types of machinery.

Processing Process of Straight Seam Welded Pipe

The steel coil is uncoiled and passed through a series of shearing and leveling machines to form a flat and straight steel strip. The strips are then fed into a welding machine and welded lengthwise to form a continuous seam.

With the high-frequency resistance welding (HFW) process, electrodes and a power source are used to heat and melt the steel at the joint.

The pipeline undergoes a series of testing and inspection processes including pressure testing, ultrasonic testing, visual inspection and magnetic particle inspection. Cut and coat the straight seam welded pipe to prevent corrosion.

ASTM A691 1 1/4CR Alloy Steel Welded Pipe

The Difference Between Straight Seam Welded Pipe and Spiral Steel Pipe

Fundamentally speaking, spiral steel pipe or straight seam welded pipe is a kind of welded tube. Because of their superior performance, these two steel pipes are widely used in various projects. Of course, because the two production processes are different, in actual there is still a big difference in the use process, which directly leads to a big difference in the use range of the two steel pipes.

Compared with spiral steel pipes, the production process of straight seam welded pipes is much simpler. The production process of straight seam welded pipes is mainly divided into two types, one is high frequency welded straight seam welded pipe, and the other is submerged arc welded straight seam welded pipe. It is precisely because of these characteristics that the production process of the straight seam welded pipe is simple, the production efficiency of the straight seam welded pipe is very high, the cost is low, and the development speed is also very rapid.

production process

LSAW STEEL PIPE PRODUCTION PROCESS

Packaging and Shipping of Straight Seam Welded Pipe

Packing	In bundle
Shipping	Shipped by road, sea, rail or air

FAQ

Q: What is straight seam pipe?

A: Characteristics of straight seam welded pipes. A straight seam steel pipe is a steel pipe with a weld seam parallel to the longitudinal direction of the steel pipe. Usually divided into metric welded pipes, welded thin-walled pipes, transformer cooling oil pipes, and so on.

Q: What is seam weld pipe?

A: Seamed pipe is the strip or plate bent into a circular, square and other shapes, and then welded into the surface of the connecting pipe. Pipe is the use of steel or steel strip.

Q: What is the difference between seamless and seam welded pipe?

A: Furthermore, the pressure capacity of seamless pipes is higher than welded ones, and the surface is much smoother, with the chances of corrosion being reduced. A combination of all these factors makes the product an effective, yet costlier option in comparison to the welded pipe.

Q: What is the difference between a seam weld and a fillet weld?

A: If two surfaces are perpendicular, (meaning there's a 90° angle between them), the weld fusing them together is a fillet. The fillet weld forms a 45° angle between the two pieces whereas the butt joint weld looks like a seam or bead.

Q: Is welded pipe cheaper than seamless?

A: Regarding cost, welded pipes are generally more economical than seamless pipes. The production process for welded pipes involves fewer steps and less material wastage, leading to lower manufacturing costs.

Q: What is the best welding method for pipe?

A: Submerged arc welding effectively welds pipes of different diameters, thicknesses, and lengths. The pipe welding industry frequently requires long and straight seams, which make this technique particularly suitable for the job.

We're well-known as one of the leading straight seam welded pipe manufacturers and suppliers in China. If you're going to buy discount straight seam welded pipe in stock, welcome to get quotation and free sample from our factory. Also, customized service is available. Seam Steel Pipe, 40Cr Straight Seam Welded Pipe, P12 Alloy Steel Pipe