Steel Pipe

Your Professional Steel Pipe Supplier

Shanghai KAIKE Pipe Technology Co., Ltd. is a reputable AAA listed pipe fittings manufacturer in China,covering an area of 66666㎡ (80000+ ㎡in stage II) and with technician and engineers more than 30 personal. Its main products include BW pipe fittings(SMLS or welded), steel flange, forged pipe fittings as well as prefabricated spools and manifolds,and also can produce according to customers' drawings and requirements.

Why choose us

Our Certifications
KEK has obtained ISO9001, ISO14001, ISO18001, CE/PED, API certification and TS pressure pipe component special equipment manufacturing license, as well as Russia's EAC continuous certification.

OEM/ODM Service
OEM and ODM are both acceptable. The material, color, style can customize, the basic quantity we will advise after we discuss.

After-sale service
We have a complete after-sales service system, so you can purchase with confidence.

ASTM A106 GR.C Seamless Pipe
Product Name: ASTM A106 GR.C seamless pipe
Dimension and Wall Thickness
Seamless: 1/2"~24" (DN15~DN600) SCH5~SCH XXS
End connection：PE or BE
Marking： according to customer's...
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Stainless Steel 316L SMLS Pipe
Product Name: stainless steel 316L SMLS pipe
Dimension and Wall Thickness
Seamless: 1/2”~24” (DN15~DN600) SCH5~SCH XXS
End connection：PE or BE
Marking： according to...
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SA335 GR P91 Seamless Pipe
Product Name: SA335 GR P91 Seamless pipe
Dimension and Wall Thickness
Seamless: 1/2”~24” (DN15~DN600) SCH5~SCH XXS
End connection：PE or BE
Marking： according to...
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ASTM A333 GR6 DN600 PIPE
Product Name: ASTM A333 GR6 PIPE
Dimension and Wall Thickness
Seamless: 1/2”~24” (DN15~DN600) SCH5~SCH XXS
End connection：PE or BE
Marking： according to customer’s...
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API 5L GR. X70 Seamaless Pipe
Product Name: API 5L GR. X70 seamaless pipe
Dimension and Wall Thickness
Seamless: 1/2”~24” (DN15~DN600) SCH5~SCH XXS
End connection：PE or BE
Marking： according to...
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EFW Stainless Steel Pipe
Product Name: EFW stainless steel pipe
Dimension and Wall Thickness：
Seamless: 1/2”~24” (DN15~DN600) SCH5~SCH XXS
End connection：PE or BE
Marking： according to...
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Stainless Steel Welded Tubes
Product Name: stainless steel welded tubes
Dimension and Wall Thickness
Seamless: 1/2”~24” (DN15~DN600) SCH5~SCH XXS
End connection：PE or BE
Marking： according to...
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ERW Carbon Steel Pipes
Product Name: ERW Carbon Steel pipes
Dimension and Wall Thickness
Seamless: 1/2”~24” (DN15~DN600) SCH5~SCH XXS
End connection：PE or BE
Marking： according to customer’s...
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LSAW Carbon Pipes
Product Name: LSAW carbon pipes
Dimension and Wall Thickness
Seamless: 1/2”~24” (DN15~DN600) SCH5~SCH XXS
End connection：PE or BE
Marking： according to customer’s...
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X70 Welded Pipes
Product Name: X70 welded pipes
Dimension and Wall Thickness
Seamless: 1/2”~24” (DN15~DN600) SCH5~SCH XXS
End connection：PE or BE
Marking： according to customer’s...
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Carbon Steel Weld Neck Flange
Product Name: carbon steel Weld neck flange
Dimension and Wall Thickness：
Seamless: 1/2”~24” (DN15~DN600) SCH5~SCH XXS
End connection：PE or BE
Marking： according to...
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Composition of Steel Pipe

The main material of a steel pipe is steel, which is primarily composed of iron and carbon. In addition, steel also contains elements such as manganese, silicon, phosphorus, sulfur, tungsten, zirconium, and vanadium. Sometimes, to provide steel with more specific attributes, alloying elements such as chromium (Cr), molybdenum (Mo), cobalt (Co), and nickel (Ni) are also added.
Various chemical components have a significant impact on the physical properties of steel pipes.

Carbon (C): The higher the carbon content, the higher the hardness of the steel pipe. However, the toughness and weldability will decrease accordingly.
Silicon (Si): The content of silicon affects the tensile strength and cold-bending performance of steel pipes. If the content is too high, it will reduce cold-bending performance, while if the content is too low, it will affect the tensile strength.
Manganese (Mn): The content of manganese impacts the toughness and hardness of steel pipes. Excessive content can reduce welding performance.
Phosphorus (P) and Sulfur (S): The lower the content of these two elements, the better the cold-working performance of the steel pipe. However, this also leads to a decrease in welding performance.

Most Common Uses for Steel Pipe

THE CONSTRUCTION INDUSTRY
Since steel pipe is both durable and lightweight, it’s commonly utilized by the construction industry in commercial and residential buildings, as well as in industry sectors including power, water, sewer, manufacturing and more. Steel pipe is also a top choice in the construction industry because it’s resistant to rust and corrosion, meaning that it won’t require frequent repairs or replacement. This is especially important in water, plumbing and electrical systems, since leaks or breaks in the steel pipe can be both dangerous and costly.

THE OIL AND GAS INDUSTRY
Steel pipe is ideal for use in extreme conditions such as corrosive environments, low and high temperatures and high pressure. For this reason, steel pipe is prevalent in the oil and gas industry, especially in pipes like gathering lines (the tubes that transport oil or gas from the producing area to a storage facility or larger main pipeline), and pipe trunk lines (the welded, large-diameter steel pipes that are used to transport natural gas over long distances). Because of steel pipe’s durability and versatility, it can stand up to the unique needs of the oil and gas industry.

THE SHIPBUILDING INDUSTRY
The strength of steel makes it a great option for ship building since it withstands vibrations, shock and high pressure. Unlike other metals, steel with bend rather than break in extreme conditions, which means it’s less likely to crack or leak. In the shipbuilding industry, steel pipe is designed and manufactured for the boilers, super heaters and pressure systems of a ship.

THE TEXTILE INDUSTRY
The versatility of steel pipe makes it a popular choice in the textile industry for the production of bale openers, mixers, carding machines, spinning machines, winding machines and texturing machines.

THE AGRICULTURAL INDUSTRY
Steel pipe is frequently used in agricultural fittings due to its durability and ability to withstand pressure. Steel is also sometimes mixed with carbon to create a more lightweight yet sturdy agricultural fitting. Farmers and other agricultural organizations use steel pipe in dozens of applications, including tractor engines, grain elevators, field drainage systems, fertilizer applications, vent pipe systems and more.

INDUSTRIAL APPLICATIONS
Steel pipe is a common choice in manufacturing facilities, warehouses and other industrial locations because it’s rust-proof and doesn’t corrode, affording facilities a lifetime of dependable use. Round steel tubing is often used to transport liquids or gas from one area of an industrial facility to another, as well as in the construction of industry structures itself.

Steel pipe measurements

Length: This is fairly self-explanatory — it designates how long a piece of piping is, usually in standard increments.

Inside diameter (ID): The inside diameter is the distance between the inside walls. It can be thought of as how wide the opening in the pipe is.

Outside diameter (OD): The outside diameter is the distance from the outside edge to its opposite outside edge. This can be thought of as the total “height” of the pipe.

Wall thickness (WT): Similar to length, this is relatively self-explanatory and is the thickness of the piping’s wall. It is also half of the difference between OD and ID. Wall thickness is usually referred to as “schedule” which is a non-dimensional number that needs to be converted to the actual wall thickness using a chart.

Nominal pipe size (NPS): This is the metric that is most often used to convey the “size” of a pipe. However, the NPS is neither the ID nor the OD when it’s between ⅛” and 12”. This means that, while close to the actual diameter of the pipe, it’s another non-dimensional number and more of a designation rather than a measurement. Above 14” (or NPS 14), the nominal pipe size and OD are the same.

Steel Pipe Specifications

Steel pipes are classified based on various specifications that determine their suitability for different applications:

Sizes: Defined by nominal diameter (ND) or nominal pipe size (NPS), ranging from small (1/8 inch) to large (60 inches) diameters. Diameter determines the flow capacity.

Dimensions: Includes outside diameter (OD), inside diameter (ID), and wall thickness.

Weight: Determined by the pipe’s size and wall thickness, usually measured in pounds per foot or kilograms per meter. It helps determine transportation costs and structural load considerations.

Schedules: Indicates the wall thickness relative to the diameter, with common schedules including SCH 40, SCH 80, and SCH 160. Higher schedules mean thicker walls and higher pressure capacity.

Nominal pipe size & outside diameter size chart

For example, below is a table of NPS values from ½” to 3 ½” with their corresponding outside diameter:

Nominal Pipe Size (NPS)	Outside Diameter (OD)
½”	0.84”
¾”	1.05”
1”	1.315”
1 ¼”	1.66”
1 ½”	1.9”
2”	2.375”
2 ½”	2.875”
3”	3.5”
3 ½”	4”

Material	Tensile Strength(MPa)	Yield Strength(MPa)
ASTM A53 Seamless and Welded Steel Pipe - Grade A	331	207
ASTM A53 Seamless and Welded Steel Pipe - Grade B	414	241
A106 Seamless Carbon Steel Pipe - Grade A	330	205
A106 Seamless Carbon Steel Pipe - Grade B	415	240
A106 Seamless Carbon Steel Pipe - Grade C	485	275
A252 Piling Steel Pipe - Grade 1	345	207
A252 Piling Steel Pipe - Grade 2	414	241
A252 Piling Steel Pipe - Grade 3	455	310
A501 Hot Formed Carbon Steel Structural Tubing - Grade A	400	248
A501 Hot Formed Carbon Steel Structural Tubing - Grade B	483	345
A523 Cable Circuit Steel Piping - Grade A	331	207
A523 Cable Circuit Steel Piping - Grade B	414	241
A618 Hot-Formed High-Strength Low-Alloy Structural Tubing - Grade Ia & Ib	483	345
A618 Hot-Formed High-Strength Low-Alloy Structural Tubing - Grade II	414	345
A618 Hot-Formed High-Strength Low-Alloy Structural Tubing - Grade III	448	345

Our Certificate

FAQ

Q: What is a steel pipe?

A: Steel pipes are long and hollow tubes that are used for many different applications in a variety of places. Its versatility makes pipes the most often used product that is produced by the steel industry. They are commonly used to convey fluid substances that can flow, and small solid particles.

Q: Where to use steel pipe?

A: Steel pipes are often utilized as building piles if the soil is too thin to support the weight of large structures. Construction companies are one of the major steel pipe buyers. Applications for steel tube include the construction of ships, oil refineries, medical equipment, and even space stations.

Q: What are the three types of steel pipe?

A: Standard Pipe: There are three different types of standard metal pipes - welded (ERW Pipe), seamless pipe, and galvanized pipe. They represent 10% of all tubular products. Line Pipe: Used primarily in Oil and Gas Applications.

Q: Why is steel pipe so expensive?

A: The production and packaging of Aluminized steel pipes require more time and incur higher inspection losses, resulting in increased production costs. The stringent production technology adds to the higher prices. Remember, low prices are not a panacea; selecting quality products is paramount.

Q: What is the most common steel pipe?

A: A53. They're the most commonly used carbon steel pipe types in industry today, and they're very similar. But while the differences between A106 and A53 are few, they matter a great deal in terms of when and where each is specified.

Q: Where are steel pipes used?

A: Steel pipe is a common choice in manufacturing facilities, warehouses and other industrial locations because it's rust-proof and doesn't corrode, affording facilities a lifetime of dependable use.

Q: Which is better PVC or steel pipe?

A: The strength factor is important when it comes to choosing pipes. This not only determines how long the pipe can last but also its susceptibility to extreme conditions. Due to the material, steel pipes are generally considered to be stronger compared to PVC pipes.

Q: What grade is steel pipe?

A: Here are some commonly used steel grades for piping: Carbon Steel Grades: ASTM A106/A53/A333: These grades are commonly used for low and high-temperature service. They include various grades such as A106 Grade B and C, A53 Grade B, and A333 Grade 6.

We're professional steel pipe manufacturers and suppliers in China, specialized in providing high quality customized service. We warmly welcome you to wholesale high-grade steel pipe at low price from our factory. Contact us for cheap products.

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