AS 1528.4:2019 pdf free.Stainless steel tubes and tube fittings for food processing and hygienic applications Part 4: Clamp tube fittings.
12 Surface finish
12.1 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.
12.2 Internal surfaces
The product-contacting surfaces of the components shall be smooth and bright with a finish not inferior to a roughness parameter, Ru, of 0.8 pm as assessed in accordance with the procedure described in Iso 4288. These surfaces shall be free from harmful surface defects and inclusions.
13 Hygienic requirements
13.1 Accessibility of surfaces of coupling
All surfaces of the coupling 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.
13.2 Welded liners
Welded liners shall be internally clean and smooth. They shall be free from harmful surface defects or inclusions.
13.3 Gaskets
The gaskets shall be of an elastomeric material compatible under processing conditions with the material of the fitting, with the foodstuffs, and with the cleaning fluids. It shall not impart an odour or taste to the foodstuff.
14 Packaging
The components shall be packaged for delivery in a manner that will provide protection against the normal hazards of transport and handling.
15 Identification marking
15.1 On the container
Each container of couplings or individual components shall be legibly marked with the following in format ion:
(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.
15.2 On parts
Each stainless steel product contact component and clamp assembly shall be legibly and indelibly marked with the following information:
(a) Manufacturer’s batch number.
Grade of stainless steel material.
(c) The manufacturer’s name, trademark or logo
(d) The number of this Standard, i.e. AS 1528.4.
(e) Nominal size of the component..
EXCEPTION — Where components are of a size not able to have all of the above items 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.
16 Inspection certificates
Inspection certificates in accordance with EN 10204 type 3.1 including test results shall be made available ii requested.
NOTE The term “inspection certificate” is consistent with the terminology used in EN 10204; the term “test certificate” is more commonly used in Australia.
17 Assembling
17.1 Welding
Welded-type clamp liners shall be attached to the tube ends by means of a full penetration butt weld. The welds shall be structurally sound and product-contacting surfaces shall be free of pits, craters, or any defects which interfere with the hygienic surface. Heat tint in excess of level 3 of AWS D18.1 M shall be removed.
17.2 Expanding
Expanded-type male parts and liners shall be attached to the tube ends by expanding.
NOTE A recommended method for carrying out the expansion is provided in AppendixE.
17.3 Installation
Clamps shall be installed in accordance with Appenthx.C Fig.urCJ.AS 1528.4 pdf download.