SIST ISO 49:2001 PDF

Name: SIST ISO 49:2001 — Malleable cast iron fittings threaded to ISO 7-1
SKU: SIST ISO 49:2001
Price: 88.78 EUR
Availability: InStock

Malleable cast iron fittings threaded to ISO 7-1

Название (английский):

SIST ISO 49:2001

Malleable cast iron fittings threaded to ISO 7-1

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 38
Дата публикации:: 1 сентября 2001 г.
ICS:: 23.040.40
Технический комитет:: TLP - Pressure vessels

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Описание (английский):

Specifies requirements for the design and performance of the fittings, being for general purposes for the transmission of fluids and gases up to the limits of pressure and temperature specified. They are intended for the connection of elements threaded in accordance with ISO 7/1, sizes 1/8 to 6. For use in conditions outside the pressure and temperature limits specified, consult the fitting manufacturer.

Abstract

Похожие стандарты

Стандарты, упомянутые в описании

Overview

ISO 49:1994 - "Malleable cast iron fittings threaded to ISO 7-1" specifies design, material, dimensional and performance requirements for malleable cast iron threaded pipe fittings used for the transmission of fluids and gases. The standard covers fittings intended to mate with threads made to ISO 7-1, for sizes 1/8 to 6. It defines material grades, coating and testing requirements, dimensional tolerances, and pressure/temperature suitability. For service outside the standard’s specified pressure and temperature limits, users are advised to consult the fitting manufacturer.

Key topics and technical requirements

Scope and thread compatibility

Fittings are designed for connection with threads per ISO 7-1 (jointing threads). Fastening threads (e.g., union nuts) follow ISO 228-1.

Materials

Primary material: malleable cast iron meeting ISO 5922.
Specified grades include W400-05, W350-04, W350-10, B300-06 depending on design (whiteheart/blackheart).
Alternative ferrous materials allowed for small fittings by agreement with purchaser.

Protective coating

Hot-dip zinc coating requirements: average areic mass ≥ 500 g/m² (approx. 70 µm); individual samples ≥ 450 g/m² (≈63 µm).
Limits on trace elements and quality/continuity checks are specified.

Dimensions and tolerances

Standardized types and sizes are detailed in clauses for elbows, tees, unions, etc. Face-to-face and face-to-centre tolerances and laying lengths are provided.
Thread alignment required within ±0.5°.
Chamfer requirements: internal threads min included angle 90°, external threads 60°.

Performance & testing

Pressure/temperature ratings are specified (see standard’s table) and design test pressures are defined (hydrostatic test requirements).
Leak and strength tests: options include hydrostatic test (≥ 20 bar) or pneumatic test (≥ 5 bar) with immersion detection.
Material, coating and thread gauging/testing per referenced ISO methods.

Applications and who uses this standard

Used by manufacturers, product designers, quality and test laboratories, procurement/specifiers, and pipeline/mechanical engineers to:

Design and produce threaded malleable iron fittings for plumbing, heating, gas distribution and general fluid conveyance.
Verify material, coating and dimensional conformity for safety and interchangeability.
Establish acceptance criteria and testing procedures for batches and type-testing.

Related standards

ISO 7-1 (pipe threads for pressure-tight joints)

ISO 228-1 (non pressure-tight pipe threads)

ISO 5922 (malleable cast iron)

ISO 2859 (sampling plans)

ISO 6708 (nominal sizes)

ISO 1460, ISO 2178 (coating measurement / thickness)

Keywords: ISO 49:1994, malleable cast iron fittings, ISO 7-1 threaded fittings, hot-dip zinc coating, hydrostatic test, pipe fitting standard, design test pressure.

SIST ISO 49:2001 PDF

Abstract

Похожие стандарты

Overview

Key topics and technical requirements

Applications and who uses this standard

Related standards

Технические детали

ISO 49:1994

Malleable cast iron fittings threaded to ISO 7-1

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