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: Can steel pipes be threaded?: Yes, steel pipes can be threaded. Threading is a common process used to create a screw-like pattern on the outer surface of the pipe, allowing it to be connected to other fittings or components. Threading can be done manually or with the help of machinery, depending on the size and requirements of the pipe.

Q: How do you prevent steel pipes from rusting?: To prevent steel pipes from rusting, various measures can be taken. One effective method is to apply a protective coating on the surface of the pipes. This can be done using different types of coatings such as paint, epoxy, or zinc. These coatings act as a barrier between the steel and the corrosive environment, preventing moisture and oxygen from coming into direct contact with the metal and causing rust. Another approach is to use corrosion inhibitors. These substances are added to the water or fluid flowing through the pipes to create a protective film on the steel's surface. This film acts as a shield, inhibiting the corrosion process and preventing rust formation. Regular maintenance is crucial in preventing rust on steel pipes. This includes inspecting the pipes for any signs of damage or corrosion and promptly repairing or replacing any compromised areas. Additionally, keeping the pipes clean and dry by removing any accumulated dirt or moisture helps to prevent rust formation. In some cases, it may be beneficial to use stainless steel pipes instead of regular steel. Stainless steel contains chromium, which forms a passive oxide layer on the surface of the metal. This layer acts as a natural barrier against corrosion, making stainless steel pipes highly resistant to rust. Lastly, controlling the environment in which the pipes are installed 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 is the minimum temperature that steel pipes can handle?: The minimum temperature that steel pipes can handle depends on the specific grade and composition of the steel. Generally, steel pipes can handle extremely low temperatures without experiencing any significant issues. In fact, many types of steel are specifically designed to withstand extremely cold temperatures, making them suitable for various applications in industries such as oil and gas, construction, and cryogenics. However, it is important to note that at extremely low temperatures, steel may become more brittle, which can affect its mechanical properties. Therefore, it is essential to carefully select the appropriate grade of steel and consider any specific requirements or limitations for the intended application when determining the minimum temperature that steel pipes can handle.

Q: What are the factors affecting the cost of steel pipes?: The factors affecting the cost of steel pipes include the price of raw materials such as iron ore and coal, the cost of energy and transportation, market demand and supply dynamics, currency exchange rates, manufacturing and labor costs, and any additional taxes or tariffs imposed on steel imports. Other factors may include technological advancements, regulatory compliance, and the overall economic conditions of producing countries.

Q: What does cathodic protection of steel tubes mean?: There are two ways of cathodic protection: sacrificial anode, cathodic protection and impressed current cathodic protection.Sacrificial anode: connect a living metal or alloy to a protective metal to form a galvanic cell. The active metal replaces the protected metal to lose electrons so that the protected metal is not corroded.

Q: What is the load-bearing capacity of steel pipes?: The load-bearing capacity of steel pipes is influenced by a range of factors, including diameter, wall thickness, and steel grade. In general, steel pipes exhibit excellent load-bearing capacity due to their inherent strength and durability. The determination of load-bearing capacity involves utilizing engineering calculations and testing techniques. These calculations take into account factors such as the applied load, pipe dimensions, and material properties of the steel. To accurately ascertain the load-bearing capacity of specific steel pipes for a particular application, it is crucial to refer to engineering standards, guidelines, and consult with a structural engineer.

Q: How does galvanization protect steel pipes from corrosion?: Galvanization protects steel pipes from corrosion by creating a protective zinc layer on the surface of the steel. This zinc layer acts as a barrier, preventing moisture and oxygen from reaching the steel, thus inhibiting the formation of rust and corrosion.

Q: What is the typical diameter range of steel pipes?: The diameter of steel pipes can vary depending on factors such as the intended use, industry standards, and project requirements. Generally, steel pipes come in a wide range of diameters to cater to different needs. Typical sizes can range from small diameters of approximately 0.5 inches (12.7 mm) to larger diameters of several feet or more. This wide range allows for various applications, including plumbing, oil and gas transportation, structural support, and industrial processes. Ultimately, the diameter of a steel pipe will be determined by the specific requirements of the project or application.

Q: What are the advantages of using steel pipes in marine applications?: There are several advantages of using steel pipes in marine applications. Firstly, steel pipes are highly resistant to corrosion, making them suitable for prolonged exposure to saltwater and other harsh marine environments. Secondly, steel pipes have high strength and durability, allowing them to withstand extreme pressures and impacts commonly encountered in marine operations. Additionally, steel pipes have excellent thermal conductivity, making them ideal for transporting fluids at high temperatures. Lastly, steel pipes are readily available and can be easily fabricated and installed, ensuring efficiency and cost-effectiveness in marine applications.

Q: Can steel pipes be used for LNG terminals?: Yes, steel pipes can be used for LNG terminals. Steel pipes are commonly used in LNG terminals for transporting and distributing liquefied natural gas due to their strength, durability, and ability to withstand extreme temperatures and pressures. Additionally, steel pipes can be easily welded and have excellent corrosion resistance, making them suitable for the transportation and storage of LNG.

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