ISO 7005 Flanges Suppliers

Yes, in most cases, ISO 7005-1 flanges are technically interchangeable with EN 1092-1 flanges, as both standards share similar dimensional specifications and are often harmonized in European and international markets.

However, there are some considerations:

Key Points of Compatibility:

1. Bolt Circle Diameter, Flange Thickness, and Drilling Pattern are typically the same
2. Both standards support the same PN pressure ratings: PN6, PN10, PN16, PN25, PN40
3. Face types (RF, FF) and gasket compatibility are generally identical

When Interchangeability May Not Apply:

1. Material specifications or inspection requirements may differ
2. Some localized manufacturing tolerances might vary slightly
3. Certain industries (like offshore or power generation) demand strict standard-specific compliance

Pro Tip: When replacing or combining ISO 7005 and EN 1092-1 flanges, ensure all design parameters, material grades, and pressure-temperature charts align correctly for system safety.

ISO 7005 flanges are manufactured with specific face types to ensure effective sealing between piping components. Choosing the correct face type is essential for gasket compatibility, system pressure integrity, and leak prevention.

Common ISO 7005 Face Types:

• Raised Face (RF):
  • Most widely used
  • Suitable for high-pressure and high-temperature applications
  • Compatible with spiral wound, metal jacketed, and standard gaskets
• Flat Face (FF):
  • Used in low-pressure systems or where mating with cast iron equipment
  • Requires full-face gaskets
• Ring Type Joint (RTJ):
  • For critical applications involving extreme pressure or temperature
  • Requires a machined metal ring gasket seated in a groove

Selection Tips:

• Media Type: Fluids, gases, steam, etc.
• Operating Pressure & Temperature
• Mating Equipment Material
• Gasket Type & Availability

Correct flange face selection ensures leak-free connections, reduces maintenance, and improves system reliability.

ISO 7005 flanges are subject to strict quality control and inspection protocols to ensure compliance with pressure containment, dimensional accuracy, and safety standards.

Common Testing & Inspection Methods:

1. Hydrostatic Pressure Test

   Ensures the flange can withstand rated pressure without leakage or deformation.

2. Dimensional Inspection

   Verified against ISO 7005 tolerances for OD, bolt circle diameter, thickness, and bore.

3. Material Test Reports (MTRs)

   Include chemical composition and mechanical properties, traceable to the heat number.

4. Nondestructive Testing (NDT) (on request or as per client spec):
   • Ultrasonic Testing (UT)
   • Magnetic Particle Inspection (MPI)
   • Dye Penetrant Test (DPT)
5. Visual Inspection

   Final QC check for surface finish, face flatness, bolt hole alignment, and coating quality.

Certifications Provided:

• EN 10204 Type 3.1 or 3.2
• ISO 9001 compliance
• PED / NORSOK / NACE certification (if applicable)

Testing ensures the flanges are fit for high-integrity applications in oil & gas, water treatment, chemical plants, and marine systems.

ISO 7005 flanges are manufactured with precise tolerances and machining guidelines to ensure proper sealing, bolt alignment, and interchangeability in international piping systems.

Key Tolerance Aspects:

• Bolt Hole Alignment:
  • Tolerance on pitch circle diameter (PCD) and hole spacing must adhere to ISO 286-2 fits.
  • Misalignment beyond limits can result in torque issues and improper gasket seating.
• Facing Finish:
  • Raised Face (RF) or Flat Face (FF) finishes typically range from Ra 3.2 to 6.3 μm, following spiral or concentric serration patterns for optimal gasket grip.
• Flange Thickness & OD:
  • Controlled within ±1 mm or less, depending on PN rating and size.
  • Ensures compatibility with mating flanges and accurate pressure handling.
• Hub Bore & Bevel (for welding necks):
  • Machined to match pipe OD + wall thickness.
  • Ensures full-penetration welds and structural strength.
• Flatness Tolerance:
  • Generally within 0.3 mm for diameters less-than 600 mm; critical for sealing integrity.

Compliance Reference:

All tolerances and machining specs comply with ISO 7005-1, ISO 7005-2, and respective material standards (e.g., ISO 9624 for steel flanges).

Nutech Overseas is a trusted global exporter of ISO 7005 standard flanges, delivering precision-engineered solutions to over 40 countries across various industries. Our strong logistic network and compliance with international certifications enable us to serve critical applications worldwide.

Key Export Destinations:

• Europe: Germany, Italy, Spain, France, Netherlands, Poland, UK
• Middle East: UAE, Saudi Arabia, Oman, Qatar, Kuwait, Iraq
• Asia-Pacific: Singapore, Indonesia, Malaysia, South Korea, Vietnam
• Africa: South Africa, Egypt, Nigeria
• Americas: USA, Mexico, Brazil, Argentina, Canada
• Oceania: Australia, New Zealand

Why Global Clients Prefer Nutech:

• Adherence to ISO 7005 and EN standards
• Full traceability with EN 10204 3.1 / 3.2 certifications
• On-time delivery with customized packaging
• Competitive pricing with quality assurance

We support OEMs, EPC contractors, and industrial buyers in sectors like oil & gas, petrochemicals, shipbuilding, water treatment, and renewable energy projects.