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Your Leading Stainless Steel Welded Pipe Supplier

 

GNEE is a professional supplier of austenitic stainless steel, super austenitic stainless steel, duplex steel, super duplex steel and other materials. It has internationally advanced high-precision production equipment and first-class processing technology. The product implementation standards include: national standard, American standard, Japanese standard, German standard, European standard, Russian standard, etc. At the same time, non-standard products can be customized according to customer requirements.

 
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Why choose us?

Our factory

At present, the total investment is RMB 30 million, the plant area is more than 35,000 square meters, and the number of employees is more than 200 and exports 5 million tons of steel products and accessories to overseas customers each year, with annual sales exceeding US$800 million.

Our certifications

GNEE Group has passed SGS certification and has successively obtained ISO9001, ISO14001, ISO45001 system certification, ensuring that all steel pipes and accessories meet quality requirements.

 

Sales market

It has exported steel pipes to more than 150 countries and regions including the United States, Mexico, Venezuela, Kuwait, Colombia, Turkey, Italy, Brazil, France, Iran, Russia, Vietnam, etc.,

Our products

Its main products include stainless steel pipes, stainless steel plates, stainless steel coils, stainless steel bars and stainless steel pipe fittings, etc., with competitive quality and price.

 

 

Types of Stainless Steel Welded Pipe：

Electric-resistance welded pipe (ERW)

ERW pipe is produced through a process of cold-forming a sheet of steel into the shape of a cylinder. Electrical current is passed through the sheet’s edges to heat it to the degree required to join and bond those edges. ERW pipe does not require the use of welding filler material. It can either be produced using high or low frequency. ERW pipe is strong, and its seams are often barely detectable.

Longitudinal welded pipe (LSAW or DSAW)

LSAW pipe is produced by cold-forming a heavy carbon steel plate. This method of production results in a straight seam that extends across the entire length of the pipe externally. DSAW pipe follows a similar process but is double-submerged and results in a seam that extends across both the external length of the pipe and the internal length of the pipe. LSAW and DSAW pipes are generally sized between 12m and 20m. The quality and strength of this welding technique is quite impressive, and both LSAW and DSAW pipes are appropriate for applications that require high-pressure resistance.

Spiral welded pipe

This pipe is welded by winding either a steel plate or HR coil into a spiral shape. Spiral welded pipe may also be referred to as helical submerged arc welded (HSAW) pipe. Spiral welded pipe can reach particularly long lengths and result in a notable degree of thickness. Production of spiral welded pipe is usually fairly quick, efficient, and affordable.

 

Characteristics of Stainless Steel Welded Pipes：
 

Corrosion resistance

The main material of stainless steel welded pipes is stainless steel, which has excellent corrosion resistance and can resist the erosion of many chemical substances such as acid, alkali, salt, etc. This makes stainless steel welded pipes widely used in chemical, petroleum, pharmaceutical and other industries.

 

Good weldability

Stainless steel welded pipes have good weldability and can be connected and assembled through welding and other processes to meet various complex structural and process requirements.

 

Smooth and beautiful surface

The surface of stainless steel welded pipe is smooth and bright, with good decorative effect. At the same time, it is easy to clean and maintain, and maintains a long-lasting appearance.

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High and low temperature resistance

Stainless steel welded pipes can maintain stable performance at both high and low temperatures, and will not deform or crack significantly due to temperature changes. This allows it to work reliably in both high and low temperature environments.

 

Lightweight

Compared with other metal materials, stainless steel welded pipes have a lower density, lighter weight, and are easier to carry and install. This reduces construction costs and improves construction efficiency.

 

Environmental protection

Stainless steel welded pipes have little impact on the environment during production and use, and meet environmental protection requirements. At the same time, due to its corrosion resistance, it reduces waste and environmental pollution caused by corrosion.

 

High strength

Stainless steel welded pipe has high strength and hardness, and can withstand high pressure and load, which makes it an important structural material in the fields of construction, bridges, machinery, etc.

 

Used of Stainless Steel Welded Pipe：
 

Food industry:

Perfect for conveying fluids in food processing, ensuring hygiene and corrosion resistance.

 

Pharmaceutical sector:

Used for sanitary and sterile fluid transport due to their corrosion resistance and cleanliness.

 

Biochemical pipelines:

Ideal for carrying sensitive fluids or chemicals requiring a corrosion-resistant environment.

 

High tolerance pipelines:

Suited for applications demanding precise tolerances due to their durability and quality construction.

 

Special geometric shapes:

Versatile enough to accommodate various shapes, crucial for customized pipeline requirements.

 

Diverse industrial applications:

Widely employed in industries like oil and gas, chemical processing, water treatment, and more due to their durability and adaptability to varied environments.

 

Product Parameters：

 

Type

Elbow, Tee, Reducer, Cap, Bend, Stub end etc.

Size

1/2" up to 110"

Surface treatment

Nature color, Varnished, Black painting, Anti-rust oil,HDP galvanized coating, 3LPE coating, Epoxy coating, FBE coating, Ceramics lined, etc.

Dimension Standard

ANSI B16.9, DIN, EN10253, GOST, JIS, MSS SP 43, MSS SP 75 ,API, Customized ,etc.

Color

Customized

Production process

Seamless, Welded

Wall thickness

SCH20, SCH30, STD, SCH40,SCH60, SCH80,XS, SCH100,SCH120,SCH140,SCH160, XXS customized, etc.

End

BW, bevel end, Plain end as per ANSI B16.25

Material

Carbon steel: A234WPB, A420WPL6 St37,St45, E24, A42CP, 16Mn, Q345, P245GH, P235GH, P265GH, P280GH ,P295GH, P355GH etc.

Pipeline steel: WPHY42, WPHY52, WPHY60, WPHY65, WPHY70, WPHY80 and etc

Cr-Mo alloy steel: P11,P22,P5, P9,P91, 10CrMo9-10, 16Mo3 etc

Application

Petrochemical industry, and aerospace industry;Pharmaceutical industry; Gas exhaust; Power plant; Ship building;Water treatment,etc.

 

Type

Seamless Pipe

Technique

Hot Rolled/Cold Drawn

Shape

Round/Customized

Process

Polished/Solution Treatment

End

Plain End/Bevel End

Sample

Free

Package

Seaworthy Package

Delivery Date

1-15 Days

Transport Package

Seaworthy Package

Specification

Customized

Stock

Size Can Customized

 

 

Packaging and Shipping：

 

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FAQ

Q: How is the welding quality of stainless steel welded pipes ensured?

A: High - quality welding equipment and skilled welders are crucial. Pre - welding cleaning to remove contaminants is necessary. Using the appropriate welding technique (such as TIG or MIG welding for stainless steel), proper filler materials, and post - welding inspection methods like non - destructive testing (e.g., X - ray or ultrasonic testing) help ensure welding quality.

Q: What are the common diameters of stainless steel welded pipes?

A: They range from small diameters like 1/8 inch for some specialized applications to large diameters up to several feet. Common diameters in industrial and construction applications are often in the range of 1 - 12 inches.

Q: What grades of stainless steel are used for welded pipes?

A: Commonly used grades include 304 and 316. Grade 304 is widely used for general applications due to its good corrosion resistance. Grade 316 has enhanced corrosion resistance, especially in chloride - rich environments, making it suitable for marine and some chemical applications.

Q: How do you clean stainless steel welded pipes?

A: For general cleaning, mild detergents and water can be used. For more stubborn deposits, a stainless - steel - specific cleaner may be required. Avoid using abrasive materials that could scratch the surface and damage the passive oxide layer that provides corrosion resistance.

Q: Are stainless steel welded pipes magnetic?

A: Some grades like 304 are generally non - magnetic in the annealed state. However, if cold - worked, they may become slightly magnetic. Grade 430 is magnetic as it has a different alloy composition.

We're professional stainless steel welded pipe manufacturers and suppliers in China, specialized in providing high quality customized service. Be free to wholesale stainless steel welded pipe in stock here and get free sample from our factory. For price consultation, contact us.

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