AS 1528.2:2019 Stainless steel tubes and tube fttings for food processing and hygienic applications
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.
1.9  Packaging
The components shall be packaged for delivery in a manner that will provide adequate protection against the normal hazards of transport and handling.
1.10  Identification marking
1.10.1  On the container
Each container of couplings or individual components shall be legibly marked with the following information:
(a) Description of contents.
(b) Size of coupling or components.
(c) Material (grade of stainless steel or type of elastomer) of which the coupling or component is made.
1.10.2  On parts
Each stainless steel component shall be legibly and indelibly marked with the following information:
(a) Manufacturer’s batch number.
(b) Grade of stainless steel material.
(c) The manufacturer’s name, trademark or logo.
(d) The number of this Standard, i.e. AS 1528.2.
(e) Nominal size of the component.
EXCEPTION — Where the components are of a size not able to have all of the above marked, the priority is as listed. Where space does not allow for full marking, items may be omitted starting with Item (e) and working up the list.