Seamless Pipes For Low And Medium Pressure Service

Seamless pipes are widely utilized in various industries for their ability to withstand low and medium pressure applications. These pipes are crafted from solid steel billets and are formed into a hollow tube without any seams, making them highly resistant to corrosion and pressure.

Key Characteristics

• Material Composition: Primarily made from carbon steel or alloy steel with specific chemical compositions for strength and corrosion resistance.
• Pressure Resistance: Designed to handle low to medium pressure systems without failure.
• Temperature Tolerance: Suitable for applications with varying temperature ranges, from cryogenic to elevated temperatures.
• Surface Finish: Smooth internal and external surfaces to reduce friction and improve fluid flow.

Specifications and Standards

Seamless pipes adhere to strict industry standards such as ASTM A179, ASTM A192, and GB3087-2008, which define their chemical composition, mechanical properties, and testing requirements.

Applications

• Fluid Conveying: Used for transporting water, sewage, oil, and natural gas over long distances.
• Hydraulic Support: Employed in hydraulic systems for structural support and reliability.
• Industrial Processes: Utilized in petrochemical plants, power generation, and other industries requiring pressure-resistant pipes.

Manufacturing Process

The manufacturing process of seamless pipes involves heating steel billets, piercing them to create a hollow tube, and then cold drawing or hot rolling to achieve the desired dimensions and tolerances.

Quality Control and Testing

Seamless pipes undergo rigorous quality control measures including:

• Chemical Analysis: To verify the steel's chemical composition against specified standards.
• Tensile and Yield Strength Testing: To ensure the pipes can withstand intended pressure and stress.
• Hydrostatic Testing: To check for leaks and confirm the pipe's integrity.
• Non-Destructive Testing (NDT): Including ultrasonic, eddy current, and magnetic particle inspections to detect internal and surface defects.

Seamless pipes for low and medium pressure service are essential in many industrial applications due to their strength, reliability, and corrosion resistance. Adhering to strict manufacturing processes and quality control standards ensures their performance and safety in various operating conditions.

Applications for heat exchange tubes, streaming tubes, low and medium pressure boiler water wall, economizer, reheater, superheater and steam pipeline.

Fluid Conveying

Seamless pipes are widely used for fluid transport, including conveying liquids such as water, sewage, oil, and natural gas. They are utilized in projects involving fluid transmission over long distances .

Hydraulic Support

Seamless pipes are used in hydraulic pillar service and hydraulic support applications. They provide the necessary strength and reliability for hydraulic systems .

Other Applications

Seamless pipes find applications in various industries, including nuclear devices, petrochemicals, shipbuilding, and more. They are utilized in environments that require high-quality pipes capable of withstanding pressure and temperature extremes.

In the main steel grade as ASTM A179, ASTM A192, GB3087-2008.

• • GB 3087-2008 is applicable to the seamless steel tubes that are made of quality carbon structural steels and used for manufacturing various low and medium pressure boilers.
  • ASTM A179 / A179M – 90a Standard Specification for Seamless Cold-Drawn Low-Carbon Steel Heat-Exchanger and Condenser Tubes
  • ASTM A192 Specification for Seamless Carbon Steel Boiler Tubes for High-Pressure Service
    • ASTM A192 —– American Society for Testing Materials standard
    • ASME SA192 —- American Society of Mechanical Engineers standards

Chemical composition(%) of GB3087

Chemical components (%) of ASTM A179

Mechanical properties of ASTM A179

Chemical compositions(%) of ASTMA 192M / ASME SA-192M

Mechanical Properties of ASTM A192

Chemical Components (%) of ASTM A210

Steel pipes Size (mm):

• Outer Dimensions.: 10.3mm – 114.3mm
• Wall Thickness: 0.8 mm – 12 mm
• Length: max 16000mm

Application: for low and medium pressure boiler water wall, economizer, reheater, superheater and steam pipeline.

Mill test certificates will be issued according to EN10204/3.1B

Well packing:

• Packed in wooden crates, wrapped in plastic, and suitably protected for sea-worthly delivery or as requested.
• Both ends of each crate will indicate the order no., heat no., dimensions, weight and bundles or as requested.

Marking:

• Pipes are supplied with marking according to standard and customer request.
• Marking is paint on the ends of pipes.
• The same data, as well as additional information per customer’s request, is indicated on the bundle’s tags.

Delivery:

• Pipes are supplied in hexagonal bundles or round bundles tied with steel strip.
• Weight of bundle – up to 5000 kg upon request of customer.
• Each bundle is furnished with three tags.