API LSAW Welded Pipes

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Loading Port:: SHANG HAI PORT

Payment Terms:: TT or L/C

Min Order Qty:: 50MT m.t.

Supply Capability:: Based On Order m.t./month

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LSAW Welded Steel Pipes

Application:

It is widely applied to line pipe in oil and sewage transportation , and it is used in Low pressure liquid and gassy transportation and it is also good Structure pipe in building and bridge field.

Package: bundles with anti-rust painting and with plastic caps

Standard of LSAW Welded Steel Pipes: APISPEC 5L

Grade：API 5L GR.B, X40, X42, X52, X56, X60, X65, X70

Size:

OD: 406.4MM-1422MM (16”-56”)

Thickness: 8MM-50.8MM depends on OD

Standard: APISPEC 5L

Mechanical Properties of LSAW Welded Steel Pipes

Standard	Grade	（MPa）		（MPa）
		Yield strength		Tensile Strength
API SPEC 5L	PSL1
	B	≥241		≥414
	×42	≥290		≥414
	×46	≥317		≥434
	×52	≥359		≥455
	×56	≥386		≥490
	×60	≥414		≥517
	×65	≥448		≥531
	×70	≥483		≥565
	PSL2
		Min	Max	Min	Max
	B	241	448	441	758
	×42	290	496	414	758
	×46	317	524	434	758
	×52	359	531	455	758
	×56	386	544	490	758
	×60	414	565	517	758
	×65	448	600	531	758
	×70	483	621	565	758

API LSAW Welded Pipes

LSAW Steel Pipe

Q: What is the difference between steel pipes and PVC-U pipes?: Steel pipes and PVC-U pipes differ in their composition, durability, and application. Steel pipes are made from iron and carbon, providing them with high strength and resistance to extreme conditions. They are commonly used for transporting water, gas, and oil in industrial settings due to their durability and ability to withstand high pressure and temperature. PVC-U pipes, on the other hand, are made from a synthetic plastic called polyvinyl chloride. They are lightweight, corrosion-resistant, and easy to install, making them ideal for residential plumbing, irrigation systems, and drainage. While steel pipes are more robust and suitable for heavy-duty applications, PVC-U pipes are cost-effective, versatile, and suitable for lighter applications.

Q: How do you determine the required wall thickness for steel pipes?: The required wall thickness for steel pipes is determined through various factors and calculations. One of the primary considerations is the pressure that the pipe will be subjected to. The higher the pressure, the thicker the wall needs to be to ensure the pipe can withstand the internal forces. Another important factor is the material strength of the steel used for the pipe. Different grades of steel have varying tensile strengths, which affect the required wall thickness. The tensile strength is the maximum amount of stress a material can withstand before it fails, so it is crucial to select a steel grade that can handle the expected pressure. Additionally, the pipe's diameter plays a role in determining the required wall thickness. Larger diameter pipes generally require thicker walls to maintain structural integrity and prevent deformation under pressure. To calculate the required wall thickness, engineers use industry standards and formulas. The most commonly used standard is the American Society of Mechanical Engineers (ASME) B31 code, which provides guidelines for designing pressure piping systems. The ASME code incorporates factors such as safety margins, material properties, and pressure ratings to determine the appropriate wall thickness. Furthermore, other considerations such as temperature, corrosion, and external loads may also influence the required wall thickness. For example, high-temperature applications may require thicker walls to prevent the pipe from buckling or becoming too soft. In summary, determining the required wall thickness for steel pipes involves considering factors such as pressure, material strength, diameter, temperature, and other external forces. Engineers rely on industry standards and calculations to ensure the pipe can withstand the intended operating conditions safely.

Q: What is the minimum wall thickness for steel pipes?: The minimum wall thickness of steel pipes varies depending on different factors, including the pipe's intended use and the specific industry standards and regulations. Determining the minimum wall thickness generally involves considering factors like the pipe's diameter, material strength, and the pressure or load it will experience during operation. In the oil and gas industry, for instance, the minimum wall thickness for steel pipes is typically specified by industry standards such as API 5L or ASME B31.3. These standards take into account elements such as the pipe's diameter, the material's yield strength, and the maximum pressure it will encounter. In other applications, such as structural or mechanical engineering, the minimum wall thickness for steel pipes is determined by factors like the pipe's intended load-bearing capacity, the desired safety factor, and any relevant building codes or regulations. To establish the specific minimum wall thickness requirements for steel pipes in a particular application, it is essential to consult the appropriate industry standards, codes, or regulations.

Q: How big is the seamless steel tube of DN50?: Domestic steel pipe diameter is generally divided into A series and B series, DN50 pipe diameter of 60mm and 57mm respectively, the wall thickness should be based on your design pressure, temperature, pipe material to calculate.

Q: What's the difference between stainless steel seamless tube and stainless steel welded pipe?: Stainless steel seamless pipe featuresFirst, the product of the wall is thicker, it is more economical and practical, the wall thickness of the thinner, processing costs will be substantially increased it; secondly, the product process to determine its performance limitations, generally low precision seamless steel pipe: uneven thickness, tube inner surface brightness low and high cost of fixed length, and the inner surface pitting and black spots difficult to remove; the detection and plastic third, must be processed offline. Therefore, it has its advantages in high pressure, high strength, mechanical structure and timber.

Q: What is the difference between hot-dip galvanizing and electroplating for steel pipes?: Steel pipes can be protected from corrosion using hot-dip galvanizing or electroplating, but these methods have distinct differences. With hot-dip galvanizing, the steel pipes are immersed in molten zinc, creating a strong bond with the steel. This results in a thick and durable zinc coating that effectively prevents corrosion. The entire surface of the pipe, both inside and outside, is uniformly covered, making hot-dip galvanizing ideal for comprehensive protection. Electroplating, on the other hand, involves depositing a thin layer of metal, usually zinc, onto the steel surface using an electric current. Unlike hot-dip galvanizing, electroplating does not form a metallurgical bond between the zinc and steel. Instead, it forms a mechanical bond, which is weaker and less long-lasting. The electroplated zinc layer is also thinner, offering less corrosion protection compared to hot-dip galvanizing. The application process is another point of differentiation. Hot-dip galvanizing requires immersion in molten zinc, which can be time-consuming. Electroplating, on the other hand, uses an electrolytic cell for zinc coating application, which is faster and more efficient. In conclusion, the thickness, durability, and bonding mechanism between zinc and steel distinguish hot-dip galvanizing from electroplating for steel pipes. Hot-dip galvanizing provides a thicker, longer-lasting coating with a metallurgical bond, making it superior for extended corrosion protection. Electroplating, however, creates a thinner coating with a mechanical bond, suitable for applications where a less robust level of corrosion resistance is acceptable.

Q: Galvanized steel pipe DN100 and SC100: DN is the meaning of "bore", also expressed in water supply and drainageSC is welded steel pipe, generally GB tube, that is, thick walled steel pipe, look at the design requirementsMT refers to the wire tube, usually thin-walled tube, there are KBG and JDG

Q: How are steel tubes represented?: If you speak of steel pipe, if it is water. Gas transmission pipe, then it is said: nominal diameter refers to the inner diameter. The units are millimeters or inches. [for example, water pipes with phi 25. It means that the nominal diameter (diameter) is 25mm (or an inch) steel pipe.

Q: What are the common methods for inspecting the condition of steel pipes?: Some common methods for inspecting the condition of steel pipes include visual inspection, ultrasonic testing, magnetic particle inspection, dye penetrant inspection, and radiographic testing.

Q: What are the different methods of protecting steel pipes from corrosion?: There are several methods of protecting steel pipes from corrosion, including: 1. Coatings: Applying protective coatings such as epoxy, polyethylene, or zinc to the surface of the steel pipes can create a barrier against corrosive elements. 2. Cathodic Protection: This method involves installing sacrificial anodes or impressed current systems to provide a protective current that counteracts the corrosion process. 3. Corrosion Inhibitors: Adding chemicals or inhibitors to the fluid or environment surrounding the pipes can reduce the rate of corrosion. 4. Internal Linings: Applying internal linings made of resin, cement, or other materials can protect the inner surface of the pipes from corrosion caused by the transported fluid. 5. Design Considerations: Implementing proper design practices like avoiding sharp bends and crevices, ensuring proper drainage, and using corrosion-resistant alloys can help prevent corrosion in steel pipes.

We has nine sets of machine unit for Φ219-Φ2850 of SAWH steel pipe with an annual production capacity of around 260,000 tons, two sets of SAWL production lines: one with Φ1422 maximum and one Φ813 maximum with an annual production of 200,000 tons, two sets of machine unit for Φ168 maximum and Φ508 maximum HFW steel pipe with an annual production volume of around 160,000 tons, four sets of machine unit of square and rectangle pipe for the size of 200×200, 400×400, 250×250, 300×300 with an annual production capacity of around 140,000 tons and two sets of machine unit for internal and external coating with an annual production capacity of 2,000,000 sq.meters.

1. Manufacturer Overview

Location	Wuxi, China
Year Established	1980
Annual Output Value	Above Three Million To Five Million RMB
Main Markets	Main land
Company Certifications	Certificate of Conformity; API 5CT

2. Manufacturer Certificates

a) Certification Name
Range
Reference
Validity Period

3. Manufacturer Capability

a) Trade Capacity
Nearest Port	Shanghai
Export Percentage	30%-40%
No.of Employees in Trade Department	1400 People
Language Spoken:	English; Chinese
b) Factory Information
Factory Size:	1500 square meters
No. of Production Lines	Above 14
Contract Manufacturing	CNPC;Sinopec Group
Product Price Range	Average