I. Execution Standards

This product is manufactured in accordance with authoritative industry standards from multiple countries, as follows:

International Standards: ANSI / ASME B16.5 (NPS 1/2 to NPS 24)

   • Applicable to: NPS 1/2 ~ NPS 24 (inch diameter)

      • Pressure Ratings: 150, 300, 600, 900, 1500, 2500 LB

      • Applications: The most mainstream standard for petroleum, chemical, valve, and pipeline applications.

International Large Diameter Standards: ANSI / ASME B16.47 (NPS 26 to NPS 60)

   • Applicable to: NPS 26 ~ NPS 60 (extra-large diameter)

   • Applications: Large pipelines, storage tanks, power plants, long-distance pipelines

European Standards: DIN 2501 / 2543 / 2545 / 2632 / 2633 / 2634 / 2635 / 2636 / 2637 / 2638

   • Pressure: PN6, PN10, PN16, PN25, PN40

   • Structure: Plate flange, necked flange, blind flange, sliding flange, etc.

EU Latest Standard: EN 1092-1

   • Type: 01~04 Plate flange, necked weld neck flange, blind flange, etc.

   • Pressure: PN6~PN100

Chinese National Standards: GB / HG / SH / JB (Chinese Standards)

      GB: National Standard (General)

      HG: Chemical Industry Flange (Most commonly used in chemical industry)

      SH: Petrochemical Industry (Sinopec, PetroChina)

      JB: Machinery Industry (Old machinery industry)

II. Product Features

   • Formed using a forging process, resulting in a dense structure and excellent mechanical properties, with impact and corrosion resistance far exceeding that of ordinary steel pipes; the surface undergoes fine grinding treatment, achieving a high degree of smoothness, suitable for high-precision working conditions; customized production is supported, allowing for flexible adjustment of dimensions, materials, and performance parameters.

   • Outer diameter range: 21.3mm-1219mm; Wall thickness range: 2.0mm-50mm; Length can be customized upon request, typically 3m-12m, supporting fixed-length or multiple-length delivery.

   • Widely used in fields with high performance requirements for steel pipes, such as oil and gas extraction and transportation, petrochemical plants, power and nuclear power plants, shipbuilding and marine engineering, and engineering machinery manufacturing.

III. Pressure Ratings

   •ANSI Class: 150, 300, 600, 900, 1500, 2500

   •PN: 6, 10, 16, 25, 40, 63, 100, 160, 250, 320, 400

IV. Material Range

   Carbon Steel:

      A105, American Standard Carbon Steel (corresponding to B16.5)

      A350 LF2/LF6, American Standard Low Temperature Carbon Steel

      A694 F42/F52/F60/F65/F70, American Standard High Pressure Forging Carbon Steel (Pipeline Steel)

      20#, Commonly Used Carbon Steel in Chinese Standards

      16Mn, Low Alloy High Strength Carbon Steel in Chinese Standards

   Alloy Steel (High Temperature/High Pressure):

       A182 F11, F12, F22, American Standard Chromium-Molybdenum Heat-Resistant Alloy Steel (Power Plants, High-Temperature Steam)

       15CrMo / 14Cr1Mo / 12Cr1MoV, National Standard Heat-Resistant Alloy Steel

       20MnMo, National Standard Alloy Structural Steel

   Low Temperature Steel (Sub-zero Environments)：

       16MnD, Low Temperature Carbon Steel

       09MnNiD, Low Temperature Low Nickel Steel

       10Ni3MoVD, Cryogenic High-Strength Steel

   Stainless Steel (Corrosion Resistant):

       A182 F304 / F304L, 304 / Low Carbon 304

       A182 F316 / F316L, 316 Molybdenum Stainless Steel (Better Corrosion Resistance)

       S32168, National Standard 321 Stainless Steel (Titanium Stabilized)

   Special Alloys (Strong Corrosion):

       Hastelloy C276, Super Corrosion-Resistant Alloy

       N08367 (AL-6XN), High-Molybdenum Super Austenitic Stainless Steel

V. Size Range

   1.1/2" (DN15) ~ 60" (DN1500)

   Inches: Minimum 1.5 inches, maximum 60 inches

   Nominal diameter (DN): minimum DN15, maximum DN1500

👉 Coverage: Small diameter → Medium diameter → Extra large diameter flanges/fittings can all be made.

   Custom sizes supported

   Non-standard sizes (such as 8", 18", 42", etc., non-standard/non-national standard) can be customized according to drawings or requirements.

VI. Quality Control and Inspection (Mandatory for Factory Shipments)

   Dimension Inspection

            Check: Outer diameter, inner diameter, thickness, bolt holes, sealing surfaces, etc., to ensure they meet standards.

   •Tensile, Impact, and Hardness Testing

            Check material strength, toughness, and hardness to ensure it will not crack or break.

   •Ultrasonic Testing (UT) / Penetrant Testing (PT) / Magnetic Particle Testing (MT)

           Check for internal/surface cracks, porosity, and defects:

   •UT: Checks for internal defects

   •PT: Checks for surface opening defects (commonly used for stainless steel)

   •MT: Checks for surface defects (commonly used for carbon steel)

   Material Analysis (PMI)

      On-site composition analysis using instruments to ensure the material is genuine (304 is 304, 316 is 316).

   Certificate of Quality: Complies with EN 10204 3.1 standard

      EU-recognized formal material certificate.

VII. Application Areas

   The products are mainly used in industries such as petroleum, chemical, power plants, pipeline engineering, shipbuilding, and water treatment.

   They conform to international standards, have stable quality, and can withstand various harsh working conditions such as high pressure, high temperature, and corrosiveness.

VIII. Packaging and Delivery

 Packaging method: Wooden crate packaging or pallet + waterproof membrane wrapping

 Suitable for export transportation, providing protection against collision, moisture, and rust.