GB/T 19518.1-2024Explosive atmospheres - Electrical resistance traces heating - Part 1: General and testing requirements (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 for standardization documents" Drafting.

This document is part 1 of GB/T 19518 "Resistance Tracer Heaters for Explosive Atmospheres". GB/T 19518 has been published for the following part.

--- Part 1: General and test requirements;

--- Part 2: Design, installation and maintenance guidelines.

This document replaces GB/T 19518.1-2017 "Resistive trace heaters for explosive atmospheres Part 1: General and test requirements" Compared with GB/T 19518.1-2017, in addition to structural adjustments and editorial changes, the main technical changes are as follows.

--- Added a table of applicability of GB/T 3836.1-2021 clauses (see Table 1);

--- Changed the requirements for steady-state design (see 4.5.2, 4.4.2 of the 2017 edition);

--- Changed the requirements for controlled design (see 4.5.3, 4.5.3 of the 2017 edition);

--- Added requirements for combustion test burners and fuels (see 5.1.4);

--- Added the minimum temperature shock test (see 5.1.5.2);

--- Added the requirements for winding samples on the mandrel in the thermal stability test of electrical insulating materials (see 5.1.11);

--- Added thermal performance test (see 5.1.12);

--- Changed the system method for determining the maximum sheath temperature (see 5.1.13.3, 5.1.13.4, 5.1.13.2 of the 2017 edition);

--- Added outdoor exposure test (see 5.1.16);

--- Changed the marking requirements (see Chapter 6, Chapter 6 of the 2017 edition);

--- Added document requirements (see Chapter 7);

--- Added an appendix on the design verification method for heater products (see Appendix A).

This document is modified to adopt IEC/IEEE60079-30-1.2015 "Explosive atmospheres Part 30-1.General and Test requirements".

This document has made the following structural adjustments compared to IEC/IEEE60079-30-1.2015.

--- Appendix A corresponds to Appendix C of IEC/IEEE60079-30-1.2015;

--- Appendix B corresponds to Appendix A of IEC/IEEE60079-30-1.2015;

--- Appendix C corresponds to Appendix B of IEC/IEEE60079-30-1.2015.

The technical differences between this document and IEC/IEEE60079-30-1.2015 and their reasons are as follows.

--- The clauses in Table 1 have been changed to be consistent with GB/T 3836.1-2021;

--- IEC 60050-426 (see Chapter 3) has been replaced by the normative reference GB/T 2900.35 to adapt to my country's technical conditions, Increase operability;

--- IEC 60050-151 (see Chapter 3) has been replaced by the normative reference GB/T 2900.83 to adapt to my country's technical conditions, Increase operability;

--- Replaced IEC 60079-0 with the normative reference GB/T 3836.1-2021 (see Chapter 3, 4.1, 4.3, 5.1.1, 6.1, 6.2) to adapt to my country's technical conditions and increase operability;

--- Replaced IEC 60079-7 (see Chapter 3) with the normative reference GB/T 3836.3 to adapt to my country's technical conditions and increase Operability;

--- The normative reference GB/T 5169.15 replaces IEC 60695-11-3 (see 5.1.4) to adapt to my country's technical conditions and increase Increase operability;

--- ISO 4582 (see 5.1.16) has been replaced by the normative reference GB/T 15596 to adapt to my country's technical conditions and increase operability.

Sex;

--- Replaced ISO 4892-1 (see 5.1.16) with the normative reference GB/T 16422.1 to adapt to my country's technical conditions and increase Operability;

--- Replaced ISO 4892-2 (see 5.1.16) with the normative reference GB/T 16422.2 to adapt to my country's technical conditions and increase Operability;

--- Deleted Appendix D on the requirements for heating systems for Section 1 and Section 2 locations to align with my country's classification method for explosive atmosphere locations Consistent.

The following editorial changes were made to this document.

--- In order to coordinate with the existing standard series, the standard name is changed to "Resistive Heaters for Explosive Atmospheres Part 1: General and Test Inspection Requirements;

--- Deleted the note on the standard clause number in Table 1;

--- Added information about the addresses of ISO and IEC terminology databases in the terms and definitions;

--- The note on the definition of "heating device" in 3.41 was deleted in the terms and definitions;

--- Information about the professional field and source of terms has been deleted from terms and definitions;

--- Deleted Appendix E on the type test of heating in sections 1 and 2;

---Replace the international documents cited for informational purposes with Chinese documents.

Introduction

GB/T 19518 "Resistance Tracer Heaters for Explosive Atmospheres" aims to establish the basic requirements for resistance trace heaters for explosive atmospheres and provide Provides application guidance in the form of a partial standard, including the following parts.

--- Part 1: General and test requirements;

--- Part 2: Design, installation and maintenance guidelines.

Electric heating systems are widely used in explosion-hazardous places in the petroleum, chemical and other industries. In terms of standardization of such equipment, my country has in 2004, the IEC 62086 series was adopted to formulate GB 19518.1-2004, and GB/T 19518.2-2004 on the design, installation and maintenance of electric heating, followed by IEC 60079-30 in 2017 Since the 2017 version of the standard was released and implemented, the design and testing technologies of electric heating systems have made certain new developments.

Its application also puts forward new requirements. In terms of international standards, the current versions of the corresponding standards are IEC/IEEE60079-30-1.2015 and IEC/IEEE60079-30-2.2015, its main technical content is applicable to my country's situation.

In order to keep pace with the development of international standards, the GB/T 19518 series needs to be revised.

For this document, this revision adopts IEC/IEEE60079-30-1.2015 "Explosive atmospheres Part 30-1.Electrical resistance heating Based on the main technical contents of the General and Test Requirements, appropriate modifications have been made to suit the situation in my country.

It is a supplement and modification to the general requirements of GB/T 3836.1.

Explosive Atmosphere Resistance Heaters Part 1: General and test requirements

1 Scope

This document specifies the general use of resistance heating devices for use in explosive atmospheres other than Equipment Protection Levels (EPL) Ga and Da.

and test requirements.

This document applies to electric resistance trace heaters consisting of factory assembled units or field (site) assembled units, which may be manufactured in accordance with the manufacturer's Series heaters, parallel heaters, heating pads or heating plates assembled and/or terminated in accordance with the instructions.

This document also includes requirements for termination components and control methods used in heat tracing systems. Explosive atmospheres covered in this document are Definitions in GB 3836.14 and GB/T 3836.35.

This document supplements and modifies the general requirements of GB/T 3836.1-2021, as shown in Table 1.

When there is a conflict between the requirements of GB/T 3836.1-2021, the requirements of this document shall take precedence.

Table 1 Applicability or exclusion of specific provisions of GB/T 3836.1-2021

GB/T 3836.1-2021 Electrical resistance heating devices and integral components Chapter and Article Number Chapter and Article Title Category I and Category II Category III Connectors as separate components

1 Scope Applicable Applicable Applicable

2 Normative references Applicable Applicable Applicable

3 Terms and definitions

Applicable, except ambient temperature, See 3.1 for details Applicable, except ambient temperature, See 3.1 for details Applicable, except ambient temperature, See 3.1 for details

4 Equipment Classification Applicable Applicable Applicable