ISO 4039-2-1998 PDF
Name in English:
St ISO 4039-2-1998
Name in Russian:
Ст ISO 4039-2-1998
Original standard ISO 4039-2-1998 in PDF full version. Additional info + preview on request
Full title and description
St ISO 4039-2-1998 — Road vehicles — Pneumatic braking systems — Part 2: Pipes, male fittings and holes with conical sealing surface. This part of ISO 4039 specifies dimensions and requirements for pipes, male fittings and tapped holes that use a conical sealing surface for pneumatic braking systems on road vehicles.
Abstract
ISO 4039-2:1998 defines the geometric characteristics, tolerances and basic interchangeability requirements for metric-series metallic and thermoplastic pipes, male fittings and tapped holes with a conical sealing surface used in compressed-air (pneumatic) braking systems for road vehicles. The standard ensures correct mating and leak-tight joints between components from different manufacturers.
General information
- Status: Published (confirmed; remains current after systematic review).
- Publication date: 1998-08 (edition 1, published July–August 1998).
- Publisher: International Organization for Standardization (ISO).
- ICS / categories: 43.040.40 (Braking systems).
- Edition / version: Edition 1 — ISO 4039-2:1998.
- Number of pages: 6 pages.
Scope
This part of ISO 4039 applies to pipes, male fittings and tapped holes with a conical sealing surface used in pneumatic braking systems on road vehicles operating with compressed air. It gives essential dimensions and requirements (metric series) necessary to achieve interchangeability and leak‑tight conical joints in braking system pipelines and associated fittings.
Key topics and requirements
- Definition of component types covered: pipes, male fittings and tapped holes with conical sealing surfaces.
- Essential dimensions and tolerances for metric-series parts to ensure interchangeability.
- Conical sealing-surface geometry and requirements to achieve leak-tight joints.
- References to material/pipe types commonly used (metallic and thermoplastic) and basic compatibility considerations.
- Notes on marking and conformity indication (informative guidance included in related parts/annexes of the ISO series).
Typical use and users
Used by automotive and commercial vehicle OEMs, component and fitting manufacturers, design and application engineers for pneumatic braking systems, testing laboratories and national standards bodies to ensure component interchangeability and safe, leak-free pneumatic connections in braking circuits.
Related standards
ISO 4039 is a multi-part series — see ISO 4039-1:1998 (facial sealing surface) for the complementary part of the series. Related ISO standards for braking and pneumatic connections (e.g., ISO 1728 and standards on thermoplastic tubing for air braking systems) and national identical/adopted versions (NEN, NF, UNE equivalents) are commonly cited alongside ISO 4039-2 when specifying braking system connections.
Keywords
pneumatic braking systems, pipes, male fittings, tapped holes, conical sealing surface, interchangeability, ISO/TC 22/SC 33, braking fittings, metric series.
FAQ
Q: What is this standard?
A: ISO 4039-2:1998 is an international standard that specifies dimensions and requirements for pipes, male fittings and tapped holes with conical sealing surfaces used in road-vehicle pneumatic braking systems to ensure interchangeability and leak-tight joints.
Q: What does it cover?
A: It covers essential geometrical characteristics, tolerances and mating requirements for metric-series components (pipes, male fittings and tapped/tapped holes) that use a conical sealing surface in compressed-air braking systems.
Q: Who typically uses it?
A: Vehicle manufacturers, component/fitting producers, design engineers, test laboratories and regulatory/standards organizations involved in pneumatic braking equipment and component specification and testing.
Q: Is it current or superseded?
A: ISO 4039-2:1998 was published in 1998 and was last reviewed and confirmed by ISO in 2019; the edition remains current per ISO records (the ISO lifecycle shows periodic systematic reviews). There is no published superseding edition as of the latest ISO status information.
Q: Is it part of a series?
A: Yes — ISO 4039 is multi-part. ISO 4039-1:1998 covers pipes, male fittings and tapped holes with a facial (face) sealing surface; ISO 4039-2:1998 covers the conical sealing-surface variant. The two parts together replace the earlier ISO 4039 (1977) specification.
Q: What are the key keywords?
A: Pneumatic braking systems; conical sealing surface; pipes and fittings; tapped holes; interchangeability; metric dimensions; braking fittings.