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Updated: 28 August 2026

Published: 22 August 2022

High-pressure hydraulic flanges from Parker Ermeto – ISO 6162/SAE J518 and ISO 6164

Parker Ermeto's flange programme is developed for leak-free connections in demanding hydraulic applications. At Hymatik you will find a complete range of standard and special flanges, adapters and accessories.

  • Standards: ISO 6162-1 (Light), ISO 6162-2 (Heavy) – equivalent to SAE J518; ISO 6164/CETOP
  • Sizes: Flange assemblies from 1/2” to 5”; tube O.D. 12–140 mm
  • Pressure: Up to 420 bar (6000 PSI) depending on standard and size
  • Materials: Steel (zinc-nickel ToughShield Plus) and stainless steel
  • Geometries: 3-bolt and 4-bolt square flanges, straight/angled/90° versions, blind flanges, split flange kits, complete flange adapters

What is a high-pressure hydraulic flange?

A high-pressure hydraulic flange is a mechanical connection system for tubes, hoses and components in hydraulic circuits. Flanges are used when:

  • the pressure level is high
  • the dimensions are large (particularly O.D. > 140 mm)
  • the installation space is limited and a compact solution is required

Typical industries: mobile machinery, industrial hydraulics, press and steel industry, offshore/energy, plastics and casting plants.

Standards

ISO 6162-1/-2 (SAE J518)

  • ISO 6162-1 (Light): For moderately high pressures in smaller/larger nominal sizes
  • ISO 6162-2 (Heavy): For higher pressures and/or larger dimensions
  • SAE J518: American equivalent; dimensions and bolt hole pattern match ISO 6162

ISO 6164/CETOP

  • Square flange with 4-bolt pattern; often used on blocks/manifolds
  • Suitable for very high loads and rigid installations

Product range at Hymatik

  • Square flanges: 3-bolt and 4-bolt
  • Split flange kits: Halves, bolts and O-ring (complete sets)
  • Flange adapters: Straight, angled, 90°, tees, transitions between standards
  • Blind flanges and weld flanges
  • O-rings and bolt sets in the correct grade
  • Special fittings and customer-specific flanges (shape, geometry, jump sizes, >4-bolt solutions)

View and order directly in the webshop: Hymatik's Parker Ermeto flange programme.

Materials and surfaces

Steel
Parker's steel components with zinc-nickel surface treatment (ToughShield Plus).
Benefits:

  • Significantly increased corrosion resistance
  • Stable system performance over time
  • Longer service life and lower maintenance

Read more about ToughShield here.

Stainless steel

  • For aggressive environments, offshore and the process industry
  • Combine with suitable O-ring materials according to medium and temperature

 

Specifications

  • Pressure: Up to 420 bar (6000 PSI) depending on standard/size
  • Temperature range: Depends on choice of material and O-ring; select materials according to medium/temperature
  • Tube dimensions: O.D. 12–140 mm; flange assemblies 1/2”–5”
  • Threads: All common ISO standards

Benefits of Ermeto flange solutions

  • High safety and leak-free performance under high pressure
  • Compact design for installation in confined spaces
  • Wide range and global standards for easy replacement
  • Fast service and availability through Hymatik

Ermeto is also known for other product ranges, including the EO-2 fitting series. With 25 years behind it, the series is ideal for connections between tubes and components in hydraulic systems.

Buy from Hymatik

High-pressure hydraulic flanges Flange overview

Download and print our wall chart of high-pressure hydraulic flanges.

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FAQ about high-pressure hydraulic flanges

What is the difference between ISO 6162-1 and ISO 6162-2? ISO 6162-1 (Light) is used at moderate to high pressures; ISO 6162-2 (Heavy) for the highest pressures/sizes. Bolt patterns and thicknesses vary.

Is ISO 6162 the same as SAE J518? Yes, ISO 6162 is the international standard corresponding to SAE J518. The dimensions are compatible.

When should I choose ISO 6164? When you have square flange connections on blocks/manifolds or very rigid installations with high loads.

Which material should I choose – steel or stainless? Steel (with ToughShield Plus) covers most industries. Choose stainless in aggressive or offshore environments.

How do I avoid leaks? Use new O-rings, clean the mating surfaces, tighten in a cross pattern to the correct torque, and re-tighten if needed.

Do you supply special flanges? Yes. We develop customer-specific solutions with special geometries, materials and sizes.

Can I buy directly online? Yes. See the entire range and order in Hymatik's webshop. We deliver internationally and offer fast delivery from a large stock.