Custom Special Flanges

I. Applicable Standards

This product is manufactured in strict compliance with authoritative industry standards from various countries, as listed below:

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

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

 •  Pressure level:150、300、600、900、  Use:Large pipelines, storage tanks, power plants, long-distance pipelines

DIN 2501 / 2543 / 2545 / 2632 / 2633 / 2634

/ 2635 / 2636 / 2637 / 2638

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

 •  Type:01~04 Plate type, neck butt welding, blind plate, etc.

 •  Pressure:PN6~PN100

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

GB：National Standard (General)

HG: Chemical industry flange (most commonly used in chemical industry)

SH: Petrochemical Industry (Sinopec, CNPC)

JB: Ministry of Machinery (Traditional Machinery Industry)

2. Product Features

3. Pressure level

 •&nbCarbon steel:

 321 

Stainless Steel (Titanium-Stabilized)

   Specialty Alloys (Highly Corrosive Environments):

Hastelloy Hastelloy C276, super corrosion-resistant alloy

(DN15）～ 60"（DN1500）

      • Inches represent: minimum 1.5 inches, up to 60 inches

      • Nominal diameter (DN): minimum DN15, maximum DN1500

Support size customization

• Sizes outside the standard range (e.g., 8", 18", 42", etc.—non-national standard / non-standard sizes)
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• Customization available based on drawings or specific requirements

VI. Quality Control and Testing (Mandatory Factory Exit Procedures)

Dimensional Inspection

Inspection: Outer Diameter, Inner Diameter, Thick...dimensions, bolt holes, sealing surfaces, etc., comply with the standards.

• Tensile, Impact, and Hardness Testing

Check the interior  /  and surface for any cracks, pores, or defects:

 •  UT: Check for internal defects

 •  PT": Check for surface opening defects (common in stainless steel)Use)

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

Material Analysis PMI

 316).

Warranty Complies with EN 10204 3.1 Standard

EU-recognizedformal material certificate.

7. Application fields

Capable of adapting to various harsh operating conditions, including high pressure, high temperature, and corrosive environments.

VIII. Packaging and Delivery

 + Waterproof Film Wrapping