AS 1528.3:2019 Stainless steel tubes and tube fttings for food processing and hygienic applications
1  Scope
This Standard specifies dimensional, material and hygienic requirements for butt weld tubular fittings including bends, tees, reducers, y-sections and crosses, for incorporation in tube lines for food processing and hygienic applications.
The fittings in this Standard are intended to be incorporated in tube lines either by being welded directly to tube ends (as specified in AS 1528.1) or by welding or expansion to the screwed tube fittings specified in AS 1528.2 and clamp tube fittings in AS 1528.4.
NOTE  Information to be supplied for purchase is given in Appendix A.
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 1528.2, Stainless steel tubes and tube fittings for food processing and hygienic applications, Part 2: Screwed tube couplings
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 A240M, Standard Specification for Chromium and Chromium-Nickel Stainless Steel Plate, Sheet and Strip for Pressure Vessels and for General Applications
ASTM A269M, Standard Specification for Seamless and Welded Austenitic Stainless Steel Tubing for General Service
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
3  Terms and definitions
No terms and definitions are listed in this document.
4  Symbols
Symbol Description
A = projected length of 45° bend
B = branch dimension of swept tees
C = outlet length of pulled fitting
CP = control portion for measurement of tolerances
D = outside diameter of equal fitting
E = outside diameter of smaller end of reducing fitting
F = outside diameter of larger end of reducing fitting
H = overall height of fitting
H 1 = length of end straight section of reducer
L = defining length dimension of fitting
L 1 = length including straight-end extension
L 2 = straight-end extension length
L 3 = defining length of equal radius tee
L 4 = outlet length of reducing tee and reducing cross
L 5 = outlet minor dimension of 45° tee
L 6 = outlet branch overall length of 45° tee