AS 1528.2 pdf download

AS 1528.2 pdf download.Stainless steel tubes and tube fttings for food processing and hygienic applications
1.1  Scope
This Standard specifies requirements for all screwed tube fitting types intended for food processing and hygienic applications. This includes ring-joint types, and trapezoidal thread (ISO type) stainless steel screwed couplings. The male parts and the liners are intended for use with the stainless steel tubes in accordance with AS 1528.1 and fittings specified in accordance with AS 1528.3 and AS 1528.4. NOTE  Information to be supplied for purchase is given in Appendix A.
1.2  Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. AS 1528.1, Stainless steel tubes and tube fittings for food processing and hygienic applications, Part 1: Tubes AS 1528.3, Stainless steel tubes and tube fittings for food processing and hygienic applications, Part 3: Butt weld tube fittings AS 1528.4, Stainless steel tubes and tube fittings for food processing and hygienic applications, Part 4: Clamp tube fittings AS/NZS 1554.6, Structural steel welding, Part 6: Welding stainless steels for structural purposes ISO 4288, Geometrical Product Specifications (GPS) — Surface texture: Profile method — Rules and procedures for the assessment of surface texture ASTM A182M, Standard Specification for Forged or Rolled Alloy and Stainless Steel Pipe Flanges, Forged Fittings, and Valves and Parts for High-Temperature Service ASTM A240M, Standard Specification for Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and for General Applications ASTM A276M, Standard Specification for Stainless Steel Bars and Shapes ASTM A351M, Standard Specification for Castings, Austenitic, for Pressure-Containing Parts AWS D18.1M, Specification for Welding of Austenitic Stainless Steel Tube and Pipe Systems in Sanitary (Hygienic) Applications EN 10204, Metallic products — Types of inspection documents
1.6  Materials
1.6.1  Male parts, liners, nuts and blank caps The requirements for the materials shall be as follows: (a) Cast, forged or wrought stainless steel from which male parts, liners, nuts, blank nuts and blank caps are made shall be an austenitic stainless steel and shall conform to a raw material specification that applies to the material chosen. (b) Components shall be made from one of the high alloy corrosion-resistant steels specified in ASTM A182M, ASTM A240M, ASTM A276M or ASTM A351M. (c) The steel used in welded-type components shall be of a weldable grade. (d) Filler rods for welding shall be pre-qualified as per AS/NZS 1554.6. 1.6.2  Joint rings, gaskets and seals Joint rings, gaskets and seals shall be made from elastomeric materials that are non-toxic and suitable for contact under processing conditions with the foodstuffs and cleaning fluids to be used. No odour or taste shall be imparted to the foodstuff. Special joint ring, gasket and seal materials may be required for temperatures above 100 °C.
1.7  Surface finish
1.7.1  External surfaces The external surfaces of the components shall be finished smooth by machining or polishing or both. The fittings, including the threads, shall be free from burrs. 1.7.2  Internal surfaces The product-contacting surfaces of the components shall be smooth and bright with a finish not inferior to a roughness parameter, Ra, of 0.8 μm as assessed in accordance with the procedure described in ISO 4288. These surfaces shall be free from harmful surface defects and inclusions.
1.8  Hygienic requirements
1.8.1  Accessibility of surface of coupling All surfaces of the components in contact with the product shall be easily accessible for cleaning, either by cleaning-in-place (CIP) methods or by manual cleaning when the coupling is disassembled. Removable parts shall be readily demountable. 1.8.2  Welded male parts and liners Welded-type male parts and liners shall be internally clean and smooth. They shall be free from harmful surface defects or inclusions. 1.8.3  Joint rings, gaskets and seals The joint ring, gasket and seals shall be of an elastomeric material compatible under processing conditions with the foodstuffs and cleaning fluids utilized. It shall not impart an odour or taste to the foodstuff.