GB/T 20969.5-2021Special environmental condition—Machinery for plateau—Part 5:Guide rule of test for plateau natural environment—Construction machinery (English PDF)

Foreword

This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for Standardization Work Part 1. Structure and Drafting Rules of Standardization Documents" drafted.

This document is Part 5 of GB/T 20969 "Highland Machinery with Special Environmental Conditions". GB/T 20969 has released the following part.

--- Part 1. Plateau requirements for internal combustion powered machinery;

--- Part 2. Plateau requirements for construction machinery;

--- Part 3. Specifications for selection and acceptance of plateau construction machinery;

--- Part 4. Guidelines for testing in plateau natural environment - Internal combustion power machinery;

--- Part 5. Guidelines for testing the plateau natural environment for construction machinery.

This document replaces GB/T 20969.5-2008 "Special Environmental Conditions Plateau Machinery Part 5. Guidelines for Testing in Plateau Natural Environment" Construction Machinery", compared with GB/T 20969.5-2008, in addition to structural adjustment and editorial changes, the main technical content changes are as follows:

--- Changed the "Scope" chapter (see Chapter 1, Chapter 1 of the:2008 edition);

--- Changed the "normative references" (see Chapter 2, Chapter 2 of the:2008 edition);

--- Changed some clauses of the "Guidelines" (see Chapter 4, Chapter 4 of the:2008 edition);

--- Changed the dynamic parameters and accuracy of Table 2 (see Table 2, Table 2 of the:2008 edition);

--- Changed the exhaust emission characteristic parameters and measurement methods in Table 5 (see Table 5, Table 5 of the:2008 edition).

Introduction

Due to the unique high-altitude environment in our country, construction machinery must meet these special environmental conditions and improve the adaptability and protection of construction machinery to the plateau.

Ability is very necessary and very important. GB/T 20969 aims to establish the plateau suitable for internal combustion power machinery and The requirements for construction machinery consist of five parts.

--- Part 1. Plateau requirements for internal combustion powered machinery;

--- Part 2. Plateau requirements for construction machinery;

--- Part 3. Specifications for selection and acceptance of plateau construction machinery;

--- Part 4. Guidelines for testing in plateau natural environment - Internal combustion power machinery;

--- Part 5. Guidelines for testing the plateau natural environment for construction machinery.

Under the natural environment conditions of the plateau, the test detection of construction machinery is quite different from that in low-altitude areas.

It is very important to obtain accurate data and results in order to meet the requirements of the plateau and strictly regulate the behavior of construction machinery in the plateau natural environment performance test. need.

The purpose of this document is to standardize the testing conditions, testing contents and testing methods of construction machinery in the plateau natural environment.

Provide standardized test process and result requirements for correct inspection and evaluation of product plateau performance.

1 Scope

This document specifies the performance test, type test and type test of construction machinery at an altitude of:2000m~5000m. Guidelines for testing in high altitude natural environment conditions.

This document is applicable to the test and inspection of the construction machinery supporting the internal combustion power machinery in the plateau natural environment.

2 Normative references

The contents of the following documents constitute essential provisions of this document through normative references in the text. Among them, dated citations documents, only the version corresponding to that date applies to this document; for undated references, the latest edition (including all amendments) applies to this document.

GB/T 6375 Earth-moving machinery traction force test method

GB/T 10913 Determination of traveling speed of earth-moving machinery

GB/T 18576 Terms and Definitions of Construction Machinery and Equipment

GB 20891 Limits and Measurement Methods of Exhaust Pollutants from Diesel Engines for Non-Road Mobile Machinery (China Phase III and IV)

GB/T 20969.1-2021 Plateau Machinery Part 1. Plateau Requirements for Internal Combustion Power Machinery

GB/T 20969.2-2021 Plateau machinery under special environmental conditions Part 2. Plateau requirements for construction machinery

GB 36886 Non-road mobile diesel machinery exhaust smoke limit and measurement method

JB/T 4198.2-2020 Diesel Engines for Construction Machinery Part 2. Performance Test Methods

3 Terms and Definitions

Terms and definitions defined in GB/T 18576 and GB/T 20969.2-2021 apply to this document.

4 Guidelines