GB/T 38228-2019 in English

GB/T 38228—2019 Standard Interpretation

1. Standard Overview

This standard specifies the classification, grading, technical requirements, test methods, labeling and packaging of self-contained closed-circuit oxygen breathing apparatus for escape (hereinafter referred to as respirators). It is applicable to respirators for escape from workplaces and public places (including escape from hazardous chemical accidents), but not to respirators for escape from diving operations.

2. Classification and grading

3. Technical requirements

The design, materials, performance and other aspects of the respirator must meet strict technical indicators. For example:

• Air tightness of portable device: water column pressure drop value within 15 seconds ≤80Pa.
• Mass of the whole machine: ≤5kg.
• Protection time: under rated conditions, the working time ≥3 times of the rated protection time.

Implementation suggestions

1. When purchasing a respirator, choose a product of the appropriate category and level according to the specific application scenario. 2. Before use, it must be inspected and maintained according to the manufacturer's instructions. 3. The storage environment should avoid high temperature and high humidity, and be away from fire.

Comparison of standard frameworks

Technology Evolution Analysis

The technology development of self-contained closed-circuit oxygen respirators has gone through the process from early mechanical oxygen supply to modern chemical reaction oxygen generation, and then to the application of compressed oxygen storage. In recent years, with the advancement of material science, the lightweight, reliability and comfort of the equipment have been significantly improved.