Selling all kinds of large diameter longitudinal submerged arc welded pipe

Selling all kinds of large diameter longitudinal submerged arc welded pipe System 1

Selling all kinds of large diameter longitudinal submerged arc welded pipe

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Loading Port:: Tianjin

Payment Terms:: TT or LC

Min Order Qty:: 25 m.t.

Supply Capability:: 6000 m.t./month

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Product Description:

1.Specification of LSAW Welded Steel Pipes:

1)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.

2)Standard:ASTM A53,ASTM A671 ,ASTM A672 .ASTM A252 API 5L (PSL-1,PSL-2) ,API 5L 2B ,2H,2W.DIN1626,DIN17175,DIN1629.JISG 3452,JISG3457/3456,JISG3461.GB 9711.1/SY5037/GB3092

3)Grade:API 5L GR.B, X40, X42, X52, X56, X60, X65, X70.ST37/37-2,ST33,ST35.8,ST35.4.GB 9711.1/SY5037/GB3092

OD: 406.4MM-1422MM (16”-56”)

Thickness: 8MM-50.8MM depends on OD

2. Packing & Delivery:

Packaging Details:	seaworthy package,bundles wrapped with strong steel strip
Delivery Detail:	15-30days after received 30%TT

3. LSAW Welded Steel Pipes Data Sheet:

Standard: APISPEC 5L

Mechanical Properties

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

Chemical Composition(%)

Standard	Grade	C	Mn	P	S	CEV
	Grade	Max	Max	Max	Max	Max
	PSL1					-
	B	0.26	1.2	0.030	0.030
	×42	0.26	1.3	0.030	0.030
	×46,×52,×56，X60	0.26	1.4	0.030	0.030
	X65	0.26	1.45	0.030	0.030
	X70	0.26	1.65	0.030	0.030
	PSL2					0.43
	B	0.22	1.20	0.025	0.015
	×42	0.22	1.30	0.025	0.015
	×46,×52,×56, X60	0.22	1.40	0.025	0.015
	X65	0.22	1.45	0.025	0.015
	X70	0.22	1.65	0.025	0.015

5. LSAW Welded Steel Pipes Products Showroom:

LSAW carbon welded pipe

carbon LSAW Welded Pipe

LSAW

Q: What is the outer diameter and wall thickness of the welded steel pipe of national standard DN250?: DN250 is the nominal diameter, the outer diameter of the steel pipe is 273mm, the thickness is above 6.5mm.

Q: How do you prevent steel pipes from rusting?: Various measures can be taken to prevent the rusting of steel pipes. One effective method is the application of a protective coating on the surface of the pipes. Different types of coatings, such as paint, epoxy, or zinc, can be used for this purpose. These coatings act as a barrier between the steel and the corrosive environment, thereby preventing direct contact between moisture, oxygen, and the metal, which can lead to rust formation. Another approach involves the use of corrosion inhibitors. These substances are added to the water or fluid flowing through the pipes, creating a protective film on the surface of the steel. This film acts as a shield, inhibiting the corrosion process and preventing the formation of rust. Regular maintenance plays a crucial role in preventing rust on steel pipes. It is essential to inspect the pipes regularly for any signs of damage or corrosion and promptly repair or replace any compromised areas. Additionally, keeping the pipes clean and dry by removing accumulated dirt or moisture helps prevent the formation of rust. In some cases, using stainless steel pipes instead of regular steel can be beneficial. Stainless steel contains chromium, which forms a passive oxide layer on the metal's surface. This layer acts as a natural barrier against corrosion, making stainless steel pipes highly resistant to rust. Finally, controlling the installation environment of the pipes can also help prevent rust. This can be achieved by maintaining proper ventilation, controlling humidity levels, and avoiding exposure to harsh chemicals or corrosive substances. By implementing these preventive measures, the lifespan and integrity of steel pipes can be significantly extended, while minimizing the risk of rust formation.

Q: What are the quality control measures for steel pipe production?: Quality control measures for steel pipe production typically involve several steps to ensure the final product meets the required specifications and industry standards. These measures may include inspection of raw materials, such as the steel coils or plates, to ensure they meet the required chemical composition and mechanical properties. During manufacturing, various processes like forming, welding, and heat treatment are closely monitored to maintain dimensional accuracy and integrity. Non-destructive testing methods, such as ultrasonic or radiographic inspection, are often employed to detect any defects or anomalies in the pipes. Additionally, visual inspection, surface treatment assessment, and mechanical testing are conducted to assess the overall quality before the pipes are released for distribution.

Q: How are steel pipes used in the power generation industry?: Steel pipes are used in the power generation industry for a variety of applications, including transporting fluids such as steam, water, and fuel gases, as well as for structural support in power plants and for cooling systems.

Q: What are the different methods of joining steel pipes for high-pressure applications?: There are several methods of joining steel pipes for high-pressure applications. These include butt welding, socket welding, threaded connections, and flanged connections. Butt welding involves joining the ends of two pipes by heating them and then pressing them together to create a strong and seamless connection. Socket welding involves inserting one pipe into the socket of another and then welding them together. Threaded connections involve screwing together two pipes using threaded fittings. Flanged connections involve using flanges to connect two pipes by bolting them together with gaskets to ensure a tight and leak-free joint. Each method has its own advantages and is chosen based on the specific requirements of the high-pressure application.

Q: Are steel pipes suitable for structural applications?: Yes, steel pipes are suitable for structural applications. Steel pipes are known for their strength, durability, and versatility, making them ideal for various structural applications. They can be used in buildings, bridges, stadiums, and other structures to provide support and stability. Steel pipes have high tensile strength, which allows them to withstand heavy loads and resist deformation under pressure. Additionally, their resistance to corrosion makes them a reliable choice for structural applications, even in harsh environments. The use of steel pipes in structural applications is further enhanced by their cost-effectiveness and easy installation. Overall, steel pipes are a popular choice in the construction industry due to their strength, durability, versatility, and cost-effectiveness.

Q: Are steel pipes more expensive than other types of pipes?: The cost of steel pipes compared to other types of pipes can vary depending on various factors. Steel pipes are generally considered to be more expensive than some other types of pipes in terms of upfront cost. This is mainly due to the high cost of raw materials and the manufacturing process involved in producing steel pipes. Additionally, steel pipes are known for their durability and strength, making them a popular choice for applications where high pressure or extreme conditions are involved. However, when considering the long-term cost and benefits, steel pipes can often be more cost-effective. They have a longer lifespan compared to some other types of pipes, reducing the need for frequent repairs or replacements. Steel pipes also offer excellent resistance to corrosion, making them suitable for various environments and reducing maintenance costs over time. Moreover, the strength and durability of steel pipes can contribute to a lower risk of leaks or other failures, which can result in significant cost savings in terms of preventing damage or loss. It is important to consider the specific requirements and characteristics of the project or application when comparing the cost of steel pipes to other types of pipes. Factors such as the type of fluid or material being transported, the required pressure rating, the expected lifespan, and the environmental conditions should all be taken into account. Ultimately, while steel pipes may have a higher upfront cost, their long-term durability and reliability can often make them a cost-effective choice in many applications.

Q: Why seamless steel pipe called seamless steel pipe?: Seamless steel pipe is a hollow section, without the joint round, square, rectangular steel. Seamless steel tubes are made of ingots or billets made by piercing and are then made by hot rolling, cold rolling or cold casting. Seamless steel pipe with a hollow section, as pipe conveying fluid, compared withsteel and roundsteelinsolid, flexural torsional strength in the same time, the weight is light, is a kind of economic section steel, widely used in the manufacture of structural parts and mechanical parts, such as the oil pipe, automobile transmission shaft, bike frame and construction using steel scaffolding.

Q: What is the outer diameter and wall thickness of DN40 steel pipe?: DN40 pipe diameter 48.3mm diameter, allowable deviation of plus or minus 0.5mm it depends on what you have, the outside diameter of 45, there are other dimensions, you can see the manual

Q: Can steel pipes be used for offshore oil and gas platforms?: Yes, steel pipes are commonly used for offshore oil and gas platforms due to their high strength, durability, and resistance to corrosion in marine environments.

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