Significance and Use

The purpose of this guide is to provide information that may be considered when selecting and qualifying a cleaning agent for an oxygen system.

Insufficient cleanliness can result in the ignition of contaminants or components by a variety of mechanisms. Therefore, an acceptable level of contamination for each condition of use in oxygen service should be defined. The acceptable level of contamination may depend on various factors, such as:

The nature and type of the contaminants,

The location and degree of contamination,

The type of substrate material,

The configuration and end use of the equipment or part to be cleaned, and

The operating parameters of the oxygen system (pressure, temperature, phase, concentration, fluid velocity, etc.).

1. Scope

1.1 The purpose of this guide is to establish a procedure to select cleaning agents, both solvents and water-based detergents, for oxygen service. This includes of laboratory-scale tests for cleaning effectiveness, materials compatibility and oxygen compatibility.

1.2 The effectiveness of a particular cleaning agent depends upon the method by which it is used, the nature and type of the contaminants, and the characteristics of the article being cleaned, such as size, shape, and material. Final evaluation of the cleaning agent should include testing of actual products and production processes.

1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

ASTM Standards

D471 Test Method for Rubber Property--Effect of Liquids

D543 Practices for Evaluating the Resistance of Plastics to Chemical Reagents

D1193 Specification for Reagent Water

D1460 Test Method for Rubber Property--Change in Length During Liquid Immersion

D2512 Test Method for Compatibility of Materials with Liquid Oxygen (Impact Sensitivity Threshold and Pass-Fail Techniques)

D2863 Test Method for Measuring the Minimum Oxygen Concentration to Support Candle-Like Combustion of Plastics (Oxygen Index)

D2934 Test Method for Compatibility of Vulcanized Rubber Seals--Compatibility with Service Fluids

D4809 Test Method for Heat of Combustion of Liquid Hydrocarbon Fuels by Bomb Calorimeter (Precision Method)

G5 Reference Test Method for Making Potentiostatic and Potentiodynamic Anodic Polarization Measurements

G31 Practice for Laboratory Immersion Corrosion Testing of Metals

G59 Test Method for Conducting Potentiodynamic Polarization Resistance Measurements

G63 Guide for Evaluating Nonmetallic Materials for Oxygen Service

G72 Test Method for Autogenous Ignition Temperature of Liquids and Solids in a High-Pressure Oxygen-Enriched Environment

G74 Test Method for Ignition Sensitivity of Materials to Gaseous Fluid Impact

G93 Practice for Cleaning Methods and Cleanliness Levels for Material and Equipment Used in Oxygen-Enriched Environments

G94 Guide for Evaluating Metals for Oxygen Service

G121 Practice for Preparation of Contaminated Test Coupons for the Evaluation of Cleaning Agents

G122 Test Method for Evaluating the Effectiveness of Cleaning Agents

CGA Document

Keywords

chlorofluorocarbon; cleaning; compatibility; contaminant; detergent; non-volatile residue; oxygen-enriched environment; oxygen system; ozone depletion; rinsing; solvent; Chlorofluorocarbon; Cleaning agents/processes; Compatibility; Contamination--systems (materials/applications); Detergents; Nonvolatile residue (NVR); Oxygen-enriched systems/environments; Oxygen service/systems; Ozone (O 3 ) depletion; Rinsing; Solvents ;

ICS Code

ICS Number Code 71.100.40 (Surface active agents)

DOI: 10.1520/G0127-95R08

ASTM International is a member of CrossRef.

ASTM G127