GB/T 26287-2022Aluminium alloys sacrificial anode for electrical water heater (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 replaces GB/T 26287-2010 "Aluminum Alloy Sacrificial Anodes for Electric Water Heaters".

In addition to structural adjustments and editorial changes, the main technical changes are as follows.

a) The scope has been changed, and electric water heaters are defined as non-potable water storage electric water heaters (see Chapter 1, Chapter 1 of the 2010 edition);

b) Changed the grade, specification, classification of typical structure and external dimensions of aluminum alloy sacrificial anodes for electric heating water (see 4.1, 2010 edition 4.1.1);

c) The product mark of aluminum alloy sacrificial anodes for electric water heaters has been changed (see 4.2, 4.1.2 of the 2010 edition);

d) Delete the chemical composition of 8B02 aluminum alloy sacrificial anode (see 4.4 of the 2010 edition);

e) Added the chemical composition of 8C02, 741Z.1, 781Z.1 aluminum alloy sacrificial anodes (see 5.1.1, 4.4 of the 2010 edition);

f) Changed the requirements for the chemical composition of the steel core (see 5.1.2, 4.6.1 of the 2010 edition);

g) Changed the size deviation (see 5.2, 4.3 of the 2010 edition);

h) The requirements for electrochemical performance have been changed (see 5.3, 4.5 of the 2010 edition);

i) Changed the requirements for contact resistance (see 5.4, 4.6.2 of the 2010 edition);

j) Change the surface quality requirements (see 5.5, 4.7 of the 2010 edition);

k) The test method for chemical composition has been changed (see 6.1, 5.4 of the 2010 edition);

l) Changed the test method for longitudinal curvature (see 6.2.3, 5.3 of the 2010 edition);

m) The test method for electrochemical performance has been changed (see 6.3, Appendix A, see 5.5 of the 2010 edition);

n) Changed the test method of contact resistance (see 6.4, 5.6 of the 2010 edition);

o) The detection method of surface quality has been changed (see 6.5, 5.7 of the 2010 edition);

p) Changed the inspection and acceptance rules (see 7.1, 6.1 of the 2010 edition);

q) Changed the batching requirements (see 7.2, 6.2 of the 2010 edition);

r) Changed the inspection items and sampling requirements (see 7.3, 6.3, 6.4 of the 2010 edition);

s) Changed the determination of inspection results (see 7.4, 6.5 of the 2010 edition);

t) changed the sign (see 8.1, 7.1 of the 2010 edition);

u) Changed the packaging requirements (see 8.2, 7.2 of the 2010 edition);

v) The content of the quality certificate has been changed (see 8.4, 7.4 of the 2010 edition);

w) The content of the purchase order (or contract) has been changed (see Chapter 9, Chapter 8 of the 2010 edition).

1 Scope

This document specifies the classification, technical requirements, test methods, inspection Rules and signs, packaging, transportation, storage and quality certificates and purchase orders (or contracts).

This document applies to aluminum anodes produced by extrusion and casting methods for use in non-potable storage electric water heaters. extrusion and casting methods The aluminum anodes produced for hot water boilers and solar water heaters are used as a reference.

2 Normative references

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

GB/T 196 Basic dimensions of ordinary thread

GB/T 223 (all parts) Methods for chemical analysis of iron, steel and alloys

GB/T 700 carbon structural steel

GB/T 3190 Chemical Composition of Wrought Aluminum and Aluminum Alloys

GB/T 3199 Packaging, labeling, transportation and storage of aluminum and aluminum alloy processed products

GB/T 6682 Analytical laboratory water specifications and test methods

GB/T 7999 Aluminum and aluminum alloy photoelectric direct reading emission spectrum analysis method

GB/T 8170 Numerical rounding off rules and limit value determination methods

GB/T 17432 Sampling method for chemical composition analysis of wrought aluminum and aluminum alloys

GB/T 20975 (all parts) Methods for chemical analysis of aluminum and aluminum alloys

3 Terms and Definitions

The following terms and definitions apply to this document.

4 Product categories