ISO 12151-2:2022 PDF

Connections for hydraulic fluid power and general use — Hose fittings — Part 2: Hose fittings with ISO 8434-1 24° cone connector ends with O-rings

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Title (English):

ISO 12151-2:2022

Connections for hydraulic fluid power and general use — Hose fittings — Part 2: Hose fittings with ISO 8434-1 24° cone connector ends with O-rings

Document status:: Active
Format:: Electronic (PDF)
Number of pages:: 18
Publication date:: October 14, 2022
Edition:: ISO IS 12151 edition 2 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 hose fittings with 24° cone connector ends with O-rings according to ISO 8434‑1. These hose fittings are made of carbon steel and are intended for use with hoses with nominal inside diameters from 5 mm through 38 mm (inclusive). NOTE For hose fittings used in hydraulic and pneumatic braking systems on road vehicles, see ISO 4038, ISO 4039‑1 and ISO 4039‑2. These hose fittings are for use in hydraulic fluid power systems with hoses that meet the requirements of 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 12151-2:2022

Abstract

Overview

ISO 12151-2:2022 - Connections for hydraulic fluid power and general use - Hose fittings - Part 2 covers the design, dimensional and performance requirements for hose fittings that use ISO 8434-1 24° cone connector ends with O-rings. The standard applies to carbon steel hose fittings intended for hoses with nominal inside diameters from 5 mm through 38 mm (inclusive) and is intended for hydraulic fluid power systems and general pressure applications (braking-system fittings are excluded and referenced to ISO 4038 / ISO 4039).

Key topics and technical requirements

Scope and applicability: Fittings with 24° cone connector ends and O-rings per ISO 8434-1 for hoses 5–38 mm ID.
Performance: Hose assemblies must meet the performance requirements of the relevant hose specification; working pressure is the lower of the values in ISO 8434-1 and the hose standard.
Design & dimensions: Dimensional conformity to the figures and tables in the standard; hex tolerances per ISO 4759‑1 (product grade C); elbow axis angular tolerance ±3°.
Materials & manufacture: Carbon steel standard; other materials permitted by agreement. Construction methods include forging, cold forming or machining; workmanship and surface roughness requirements (ISO 1302 MRR Ramax 6,3 µm for machined surfaces).
Corrosion protection: External surfaces and threads should be plated/coated to pass a 72‑h neutral salt spray test (ISO 9227), with defined exceptions.
Assembly & instructions: Manufacturers must provide assembly instructions (number of wrenching turns or assembly torque, tool recommendations). Assembly must be without external loads.
Designation & marking: Standardized alphanumeric designation format (e.g., ISO 12151-2 - SWS - L22 × 19). Fittings must be permanently marked with manufacturer’s name/trademark; swivel nuts marked with series (L or S) and connection size.
Procurement information: Minimum purchaser-supplied data includes fitting designation, hose type/size, fluid, working pressure and temperatures.

Applications and users

Typical users: hydraulic system designers, hose and fitting manufacturers, procurement teams, maintenance engineers, and test laboratories.
Practical uses: specifying compatible hose fittings for hydraulic machinery, mobile equipment, industrial fluid-power installations and general high-pressure hose assemblies where ISO 8434‑1 cone/O‑ring connections are required.
Benefits: ensures interchangeability, predictable performance, corrosion protection standards and clear procurement/marking requirements.

Related standards

ISO 8434-1 (24° cone connectors) - direct connector requirements referenced.
ISO 5598 (vocabulary), ISO 1302 (surface texture), ISO 4759-1 (hex tolerances), ISO 9227 (salt spray test).
Note: braking-system fittings referenced to ISO 4038, ISO 4039-1 and ISO 4039-2.

Keywords: ISO 12151-2:2022, hose fittings, 24° cone connector, O-rings, hydraulic fluid power, carbon steel, ISO 8434-1, working pressure, corrosion protection, assembly instructions.

Related standards

Standards mentioned in the description

Abstract

Overview

Key topics and technical requirements

Scope and applicability: Fittings with 24° cone connector ends and O-rings per ISO 8434-1 for hoses 5–38 mm ID.
Performance: Hose assemblies must meet the performance requirements of the relevant hose specification; working pressure is the lower of the values in ISO 8434-1 and the hose standard.
Design & dimensions: Dimensional conformity to the figures and tables in the standard; hex tolerances per ISO 4759‑1 (product grade C); elbow axis angular tolerance ±3°.
Materials & manufacture: Carbon steel standard; other materials permitted by agreement. Construction methods include forging, cold forming or machining; workmanship and surface roughness requirements (ISO 1302 MRR Ramax 6,3 µm for machined surfaces).
Corrosion protection: External surfaces and threads should be plated/coated to pass a 72‑h neutral salt spray test (ISO 9227), with defined exceptions.
Assembly & instructions: Manufacturers must provide assembly instructions (number of wrenching turns or assembly torque, tool recommendations). Assembly must be without external loads.
Designation & marking: Standardized alphanumeric designation format (e.g., ISO 12151-2 - SWS - L22 × 19). Fittings must be permanently marked with manufacturer’s name/trademark; swivel nuts marked with series (L or S) and connection size.
Procurement information: Minimum purchaser-supplied data includes fitting designation, hose type/size, fluid, working pressure and temperatures.

Applications and users

Typical users: hydraulic system designers, hose and fitting manufacturers, procurement teams, maintenance engineers, and test laboratories.
Practical uses: specifying compatible hose fittings for hydraulic machinery, mobile equipment, industrial fluid-power installations and general high-pressure hose assemblies where ISO 8434‑1 cone/O‑ring connections are required.
Benefits: ensures interchangeability, predictable performance, corrosion protection standards and clear procurement/marking requirements.

Related standards

ISO 8434-1 (24° cone connectors) - direct connector requirements referenced.
ISO 5598 (vocabulary), ISO 1302 (surface texture), ISO 4759-1 (hex tolerances), ISO 9227 (salt spray test).
Note: braking-system fittings referenced to ISO 4038, ISO 4039-1 and ISO 4039-2.

Keywords: ISO 12151-2:2022, hose fittings, 24° cone connector, O-rings, hydraulic fluid power, carbon steel, ISO 8434-1, working pressure, corrosion protection, assembly instructions.

ISO 12151-2:2022 PDF

Technical details

Abstract

Overview

Key topics and technical requirements

Applications and users

Related standards

Related standards

Abstract

Overview

Key topics and technical requirements

Applications and users

Related standards

Related standards

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