AS 2528-1982

Specifies requirements for fasteners mainly intended for bolting for flanges and other pressure-containing purposes. Covers a metric series for the temperature range -50 degrees Celsius to +300 degrees Celsius and an inch series for -250 degrees Celsius to +575 degrees Celsius. Appendices deal with strength and performance of inch series studbolts at elevated temperatures, method for checking squareness of thread, sampling for mechanical properties, material standards for inch bolting and metric equivalents for inch series studbolts and nuts.

This standard specifies requirements for bolts, studbolts and nuts, mainly intended for bolting for flanges and other pressure-containing purposes. It covers both a metric series and an inch series of fasteners.Materials have been selected for use in temperature conditions from -250°C to +575°C, and provision is also made for the supply of bolts, studbolts and nuts with hot-dip galvanized and other metallic coatings to provide improved corrosion resistance at essentially ambient temperatures.The dimensional and marking requirements (except property class/strength grade marking) of this standard also apply to non-ferrous, stainless steel and weather-resistant steel fasteners.NOTE: Appendix A gives information on bolting strength performance at elevated temperatures.The specific requirements are given in the following Sections: (a) Section 2-specifies a metric series of bolts, studbolts and associated nuts for use in the temperature range -50°C to +300°C.NOTES:1. This Section covers the bulk of the requirements of AS 2129.2. Bolts and studbolts of property class 4.6 and nuts of property class 5, manufactured from free cutting steel, should not be used at temperatures in excess of +200°C.(b) Section 3-specifies an inch series of studbolts and associated nuts with unified threads covering-(i) bolting for flanges to ANSI B16.5 and other flanges as used in the petroleum, chemical, petrochemical industries and other applications in the temperature range -250°C to +575°C; (ii) bolting suitable for flanges to AS 2129 in the cryogenic and elevated temperature ranges, i.e. -200°C to -50°C and +300°C to +525°C.

First published 1982