ISO 14952-2:2003

Name: ISO 14952-2:2003 — Space systems — Surface cleanliness of fluid systems — Part 2: Cleanliness levels
SKU: ISO 14952-2:2003
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Space systems — Surface cleanliness of fluid systems — Part 2: Cleanliness levels

Название (английский):

ISO 14952-2:2003

Space systems — Surface cleanliness of fluid systems — Part 2: Cleanliness levels

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 6
Дата публикации:: 17 ноября 2003 г.
Издание:: ISO IS 14952 edition 1 version 1
ICS:: 49.080

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Описание (английский):

ISO 14952-2:2003 defines the cleanliness levels used in the cleaning, analysis, and verification procedures for space fluid systems. It establishes a common nomenclature for use in describing cleanliness levels for equipment used in ground support equipment, launch vehicles and spacecraft. ISO 14952-2:2003 is used to specify the cleanliness level of fluid system components and equipment used in space systems. It is applicable equally to ground support equipment, launch vehicles and spacecraft.

Abstract

Похожие стандарты

Стандарты, упомянутые в описании

Overview

ISO 14952-2:2003 specifies cleanliness levels for surfaces in contact with fluids in space systems. It defines a common nomenclature and numeric/letter codes used to specify and verify the particulate, non‑volatile residue (NVR), and visible contamination requirements for components and equipment used in ground support equipment, launch vehicles and spacecraft. The standard supports consistent cleaning, analysis and verification of fluid-system hardware across programs and suppliers.

Key topics and requirements

Classification of cleanliness levels: Cleanliness is described using discrete codes (e.g., particulate levels such as 200, 300; combined codes such as 200B; and NVR levels A…J). The code chosen is used to instruct cleaning centres and to label sealed packaging after verification.

Three contamination types:

Particulate contamination - defined by particle size ranges and maximum counts (presented in a tabular system).
Non‑volatile residue (NVR) - specified as surface and volumetric limits tied to lettered levels.
Visible contamination - qualitative visual categories (e.g., “visually clean”, UV‑inspected).

Test methods: Six methods (I–VI) are defined by application:

Method I - rinse test (small items, controlled environments)
Method II - liquid flow test (hoses, tubing, assemblies)
Method III - gas flow test for residual moisture
Methods IV–V - system flow tests to evaluate delivery of clean fluids/gases
Method VI - gas flow assessment after wet or brush cleaning of piping The standard advises Methods I or II as default unless the customer specifies otherwise.

Traceability and handling: After cleaning and verification, items must be sealed and labeled with the cleanliness code to preserve status during transport and integration.

Basis and lineage: Particulate levels were derived from prior military/national criteria (e.g., MIL‑STD‑1246C) and empirical particle distributions.

Applications and users

Specify acceptance criteria for fluid-system components (valves, filters, tubing, fittings).

Define procurement and inspection requirements for contractors and cleaning centres.

Guide QA, integration and contamination-control procedures for ground support equipment, launch vehicles and spacecraft.

Typical users:

Aerospace design and systems engineers

Manufacturing, cleaning and test facilities

Quality assurance and procurement teams

Contamination-control specialists and test laboratories

Related standards

ISO 14952-1: Vocabulary

ISO 14952-3: Analytical procedures for NVR and particulate determination

ISO 14952-4/5/6: Cleaning and drying process guidance (coarse to fine)

MIL‑STD‑1246C (historical basis for particulate levels)

Keywords: ISO 14952-2, surface cleanliness, space systems, fluid systems, cleanliness levels, particulate contamination, NVR, cleaning verification, ground support equipment, launch vehicles, spacecraft.

ISO 14952-2:2003

Abstract

Похожие стандарты

Overview

Key topics and requirements

Applications and users

Related standards

Технические детали

BS ISO 14952-2:2003

Space systems. Surface cleanliness of fluid systems. Cleanliness levels.

BS ISO 14952-1:2003

Space systems. Surface cleanliness of fluid systems. Vocabulary.

BS ISO 14952-3:2003

Space systems. Surface cleanliness of fluid systems. Analytical procedures for the determination of nonvolati…