AS 1528.2-2001

1 - AS 1528.2-2001 TUBES (STAINLESS STEEL) AND TUBE FITTINGS FOR THE FOOD INDUSTRY - SCREWED COUPLINGS
4 - PREFACE
5 - CONTENTS
6 - SECTION 1 RECESSED RING JOINT TYPE
6 - 1.1 SCOPE OF SECTION
6 - 1.2 APPLICATION
6 - 1.3 REFERENCED DOCUMENTS
6 - 1.4 TYPES AND ASSEMBLIES
6 - 1.5 MATERIALS
6 - 1.5.1 Male parts, liners, nuts and blank caps
6 - 1.5.2 Pressure and temperature specification
7 - 1.5.3 Joint rings
7 - 1.6 DIMENSIONS AND TOLERANCES
7 - 1.6.1 Male parts, liners, nuts and blank caps
7 - 1.6.2 Joint rings
7 - 1.7 SCREW THREADS
10 - 1.8 SURFACE FINISH
10 - 1.8.1 External surfaces
10 - 1.8.2 Internal surfaces
10 - 1.9 PACKAGING
10 - 1.10 MARKING
10 - 1.10.1 On the container
10 - 1.10.2 On parts
11 - SECTION 2 TRAPEZOIDAL THREAD TYPE SCREWED COUPLINGS (IDF TYPE)
11 - 2.1 SCOPE OF SECTION
11 - 2.2 APPLICATION
11 - 2.3 REFERENCED DOCUMENTS
11 - 2.4 MATERIALS
11 - 2.4.1 Male parts, liners, nuts and support rings
11 - 2.4.2 Filler rods for welding
12 - 2.5 SYMBOLS
13 - 2.6 EXPANDED-TYPE MALE PART
14 - 2.7 EXPANDED-TYPE LINER
15 - 2.8 WELDED-TYPE MALE PART
16 - 2.9 WELDED-TYPE LINER
17 - 2.10 HEXAGON NUT
18 - 2.11 ROUND NUT
19 - 2.12 IDF GASKET
20 - 2.13 ASSEMBLING
20 - 2.13.1 Welding
20 - 2.13.2 Expanding
20 - 2.14 HYGIENIC REQUIREMENTS
20 - 2.14.1 Accessibility of surface of coupling
20 - 2.14.2 Welded male parts and liners
20 - 2.14.3 Gasket
20 - 2.15 SURFACE FINISH
20 - 2.15.1 External surfaces
20 - 2.15.2 Internal surfaces
21 - APPENDIX A - INFORMATION TO BE SUPPLIED BY THE PURCHASER
22 - APPENDIX B - GUIDE FOR EXPANDING WITH STRAIGHT TUBE- RECESSED RING JOINT SCREWED COUPLINGS
22 - B1 INTRODUCTION
22 - B2 TOOLS
22 - B3 PROCEDURE
22 - B3.1 Preparation
23 - B3.2 Cutting the tube
23 - B3.3 Expansion
25 - APPENDIX C - GUIDE FOR WELDING
25 - C1 INTRODUCTION
25 - C2 METHODS
25 - C2.1 Method 1-Arc with filler rod
25 - C2.2 Method 2-Gas Tungsten Arc Welding (GTAW) without filler rod but with inert gas protection on both sides of the weld
25 - C3 PROCEDURE
26 - APPENDIX D - CROSS-SECTIONS OF SCREWED COUPLING ASSEMBLIES
28 - APPENDIX E - DIMENSIONS OF RECESSED RING JOINT SCREWED COUPLINGS AND COMPONENTS
28 - E1 EXPANDED-TYPE MALE PART
29 - E2 EXPANDED-TYPE LINER
30 - E3 WELDED-TYPE MALE PART LIP REMOVED, SUITABLE FOR FLAT FACED COUPLING
31 - E4 WELDED-TYPE MALE PART
32 - E5 WELDED-TYPE FACE LINER
33 - E6 WELDED-TYPE LINER
34 - E7 SLOTTED ROUND NUT
35 - E8 HEX NUT
36 - E9 BLANK CAP
37 - APPENDIX F - GROOVES FOR EXPANDED- TYPE MALE PARTS AND LINERS
38 - APPENDIX G - DIMENSIONS OF JOINT RINGS FOR RECESSED RING JOINTS
38 - G1 FLAT FACED MODIFIED SEAL, STANDARD O’RING, AUSTRALIAN CREVICE FREE SEAL
39 - APPENDIX H - TRAPEZOIDAL THREAD INTENDED FOR SCREWED COUPLINGS
39 - H1 EXPLANATION OF TERMS
39 - H1.1 Basic profile
39 - H1.2 Pitch (P)
39 - H1.3 Major diameter
39 - H1.4 Pitch diameter
39 - H1.5 Minor diameter
39 - H1.6 GO side profile
40 - H2 DETERMINATION OF THREAD LIMITING DIMENSIONS
40 - H2.1 Thread diameters
40 - H2.2 Root width of threads (w, W) on GO side profile
41 - H3 THREAD DIMENSIONS
41 - H3.1 Male Part
42 - H3.2 Nut
43 - APPENDIX I - GASKET FOR TRAPEZOIDAL THREADS TYPE COUPLING
44 - APPENDIX J - GUIDE FOR EXPANDING WITH STRAIGHT TUBE- TRAPEZOIDAL THREADS SCREWED COUPLINGS
44 - J1 INTRODUCTION
44 - J2 TOOLS
44 - J3 PROCEDURE
44 - J3.1 Preparation (see Figure J1)
44 - J3.2 Cutting the tube (see Figure J1)
45 - J3.3 Expansion (see Figure J1 and J2)
46 - J3.4 Facing off (see Figure J3)

Specifies the requirements for screwed couplings. Section 1 applies to recessed ring joint type. Section 2 applies to trapezoidal threads type. These couplings are used for effecting joins in pipelines in food processing plants. Both sections propose dimensions, tolerances, surface roughness materials, assembling and hygienic requirements for both welded-type and expanded-type male parts and liners and for nuts, ring joints or gaskets. In this revision new dimensions have been included. Appendices irrelevant for the industry with changing technologies have been deleted.

This Section applies to screwed couplings of the compressible ring joint type (RJT) for effecting joins in pipelines in food processing plants. It specifies dimensional, material and surface finish requirements for the individual components of the couplings.NOTE: Information to be supplied by the purchaser is given in Appendix A.

First published as AS N32-1960.
Revised and redesignated in part as AS 1528.2-1976.
Second edition 2001.