ISO 12151-3:2021 PDF

Connections for hydraulic fluid power and general use — Hose fittings — Part 3: Hose fittings with ISO 6162-1 or ISO 6162-2 flange ends

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Title (English):

ISO 12151-3:2021

Connections for hydraulic fluid power and general use — Hose fittings — Part 3: Hose fittings with ISO 6162-1 or ISO 6162-2 flange ends

Document status:: Active
Format:: Electronic (PDF)
Number of pages:: 17
Publication date:: October 29, 2021
Edition:: ISO IS 12151 edition 3 version 1
ICS:: 23.040.70

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Description (English):

This document specifies the general and dimensional requirements for the design and performance of flange hose fittings, made of carbon steel, for nominal hose inside diameters of 12,5 mm to 76 mm inclusive, in accordance with ISO 4397, for use with ports and clamps in accordance with ISO 6162‑1 and ISO 6162‑2. Note 1 Materials other than carbon steel can be supplied as agreed between the manufacturer and user. Note 2 For hose fittings used in hydraulic and pneumatic braking systems on road vehicles (as defined in the scope of ISO/TC 22/SC 2, Road vehicles), see ISO 4038, ISO 4039‑1 and ISO 4039‑2. These hose fittings are for use in hydraulic fluid power systems with a hose that meets the requirements of the respective hose standards and in general applications with suitable hoses.

Technical details

Technical committee: ISO/TC 131/SC 4 - Connectors and similar products and components
SKU: ISO 12151-3:2021

Abstract

Overview

ISO 12151-3:2021 is an international standard developed by ISO that specifies the general and dimensional requirements for carbon steel hose fittings with ISO 6162-1 or ISO 6162-2 flange ends. These fittings are primarily intended for hydraulic fluid power systems and general-purpose applications. They are designed for nominal hose inside diameters from 12.5 mm to 76 mm and are used in conjunction with ports and clamps compliant with ISO 6162-1 and ISO 6162-2. The standard is critical for ensuring compatibility, safety, and reliable performance in hydraulic system assembly and maintenance.

Key Topics

Design Requirements
- Hose fittings must comply with dimensional criteria aligned with ISO 4397 for tube and hose sizes.
- Performance requirements, including working pressure, must meet the lower value among the flange style rating and relevant hose standards.
- Materials, predominantly carbon steel, but alternatives can be used if agreed between manufacturer and user.
- Certain finishes and coatings are mandated to provide corrosion resistance according to ISO 9227 salt spray tests.
Types and Identification
- Specifies straight and angled fittings (22.5°, 30°, 45°, 60°, 67.5°, and 90°), including long or medium drop elbows.
- Hose fittings are designated by a standardized code that includes angle, style, pressure series, and size.
Manufacturing and Quality
- Manufacturing may involve forging, cold forming, or machining from bar stock.
- High-quality standards are required to prevent leaks or failures.
Marking and Protection
- Permanent marking with manufacturer information is required.
- Protection during shipping and storage is addressed to prevent contamination and damage.

Applications

ISO 12151-3:2021 hose fittings are used in a wide range of industrial sectors where hydraulic fluid power is essential. Typical applications include:

Industrial Hydraulic Systems Used in machine tools, presses, and automated equipment where reliable fluid transmission is required.
Mobile Equipment Employed in construction, agricultural, and mining machinery to connect hydraulic hoses to pumps, cylinders, and valves.
General Fluid Transfer Suitable for connecting hoses in systems carrying oil-based or water-based fluids under pressure.
Maintenance and Repair Provides guidance for replacement or upgrading of hose fittings in compliance with international requirements, ensuring ongoing safety and compatibility.

By adhering to ISO 12151-3, manufacturers, suppliers, and end-users ensure interchangeability, reduce assembly errors, and maintain high performance in their hydraulic and fluid handling systems. The use of standardized fittings minimizes downtime and simplifies maintenance.

Related Standards

ISO 6162-1 / ISO 6162-2 Define the specifications for flange connections, ports, and mounting for hydraulic systems.
ISO 4397 Covers nominal outside diameters of tubes and hose sizes for fluid power connectors.
ISO 9227 Specifies procedures for salt spray corrosion testing of protective coatings.
ISO 1302 Addresses surface texture indication for technical product documentation.
ISO 4038, ISO 4039-1, ISO 4039-2 Apply to hose fittings used in hydraulic and pneumatic braking systems for road vehicles.
ISO 1436, ISO 3862, ISO 3949, ISO 4079 Include requirements for different hose types compatible with ISO 12151-3 fittings.
ISO 6605, ISO 19879 Detail test methods for hoses and hydraulic connections.

ISO 12151-3:2021 offers globally recognized criteria for the safe, efficient, and standardized use of hydraulic hose fittings with flange ends, facilitating best practices in system design and maintenance.

Related standards

Standards mentioned in the description

Abstract

Overview

Key Topics

Design Requirements
- Hose fittings must comply with dimensional criteria aligned with ISO 4397 for tube and hose sizes.
- Performance requirements, including working pressure, must meet the lower value among the flange style rating and relevant hose standards.
- Materials, predominantly carbon steel, but alternatives can be used if agreed between manufacturer and user.
- Certain finishes and coatings are mandated to provide corrosion resistance according to ISO 9227 salt spray tests.
Types and Identification
- Specifies straight and angled fittings (22.5°, 30°, 45°, 60°, 67.5°, and 90°), including long or medium drop elbows.
- Hose fittings are designated by a standardized code that includes angle, style, pressure series, and size.
Manufacturing and Quality
- Manufacturing may involve forging, cold forming, or machining from bar stock.
- High-quality standards are required to prevent leaks or failures.
Marking and Protection
- Permanent marking with manufacturer information is required.
- Protection during shipping and storage is addressed to prevent contamination and damage.

Applications

ISO 12151-3:2021 hose fittings are used in a wide range of industrial sectors where hydraulic fluid power is essential. Typical applications include:

Industrial Hydraulic Systems Used in machine tools, presses, and automated equipment where reliable fluid transmission is required.
Mobile Equipment Employed in construction, agricultural, and mining machinery to connect hydraulic hoses to pumps, cylinders, and valves.
General Fluid Transfer Suitable for connecting hoses in systems carrying oil-based or water-based fluids under pressure.
Maintenance and Repair Provides guidance for replacement or upgrading of hose fittings in compliance with international requirements, ensuring ongoing safety and compatibility.

Related Standards

ISO 6162-1 / ISO 6162-2 Define the specifications for flange connections, ports, and mounting for hydraulic systems.
ISO 4397 Covers nominal outside diameters of tubes and hose sizes for fluid power connectors.
ISO 9227 Specifies procedures for salt spray corrosion testing of protective coatings.
ISO 1302 Addresses surface texture indication for technical product documentation.
ISO 4038, ISO 4039-1, ISO 4039-2 Apply to hose fittings used in hydraulic and pneumatic braking systems for road vehicles.
ISO 1436, ISO 3862, ISO 3949, ISO 4079 Include requirements for different hose types compatible with ISO 12151-3 fittings.
ISO 6605, ISO 19879 Detail test methods for hoses and hydraulic connections.

ISO 12151-3:2021 PDF

Technical details

Abstract

Overview

Key Topics

Applications

Related Standards

Related standards

Abstract

Overview

Key Topics

Applications

Related Standards

Related standards

Hydraulic fluid power — Flange connectors with split or one-piece flange clamps and metric or inch screws — P…

Hydraulic fluid power — Flange connections with split or one-piece flange clamps and metric or inch screws —…

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