| SPECIFICATIONS. AUSTRALIAN STANDARDS 1528.1 (AS 1528) TUBE & FITTINGS FOR THE FOOD/DAIRY INDUSTRY. (Seamless or Welded). |
| ■ MATERIAL - Tubes shall be manufactured from Austenitic or Duplex Stainless in compliance with requirements specified for the relevant grades in ASTM A240M. |
| ■ WELDED TUBES - Process of Manufacture: Welded by an inert gas protected fusion process without the use of filler rod. All welds shall have 100 % weld penetration, Weld Bead shall be internally cold worked. The weld profile shall be continuous and merge into the inner surface profile of the tube. |
| ■ CONDITIONS OF SUPPLY - Tubes shall be supplied in either cold worked or in the cold worked solution annealed condition as specified by the purchaser. Cold worked on the weld only is acceptable. |
| ■ NOTE: Tubes sizes 12.7mm OD - 25.4 mm OD are not cold worked. For any critical applications, Seamless or Hammer swaged tubes may be considered. |
| ■ Straightness Tolerance: Within 1 mm in 500 mm Long. |
| ■ Ovality Tolerance: Maximum & minimum of any cross-section shall deviate from the nominal diameter by no more than twice the permissible variation in outside diameter. The mean diameter at the cross-section shall be within the given permissible variation. |
| PHYSICAL DIMENSIONS AND TEST PRESSURE |
| Outside diameter nominal mm |
Outside diameter tolerance mm |
Wall thickness nominal mm |
Wall thickness tolerance mm |
Cut Length tolerance mm |
Test Pressure Mpa |
| 12.7 |
± 0.13 |
1.60 |
+ nill. - 0.10 |
- 0, + 3 |
26.9 |
| 19.34 |
± 0.13 |
1.60 |
+ nill. - 0.10 |
- 0, + 3 |
18.00 |
| 25.4 |
± 0.13 |
1.60 |
+ nill. - 0.10 |
- 0, + 3 |
13.5 |
| 31.8 |
± 0.13 |
1.60 |
+ nill. - 0.10 |
- 0, + 3 |
10.8 |
| 38.1 |
± 0.25 |
1.60 |
+ nill. - 0.10 |
- 0, + 3 |
9.0 |
| 50.8 |
± 0.25 |
1.60 |
+ nill. - 0.10 |
- 0, + 3 |
6.7 |
| 63.5 |
± 0.25 |
1.60 |
+ nill. - 0.10 |
- 0, + 3 |
5.4 |
| 76.2 |
± 0.25 |
1.60 |
+ nill. - 0.10 |
- 0, + 3 |
4.5 |
| 101.6 |
± 0.38 |
1.60 |
+ nill. - 0.10 |
- 0, + 3 |
3.4 |
| 127.0 |
± 0.38 |
1.60 |
+ nill. - 0.10 |
- 0, + 3 |
2.7 |
| 152.4 |
± 0.76 |
1.60 |
+ nill. - 0.10 |
- 0, + 3 |
2.2 |
| 203.2 |
± 0.76 |
1.60 |
+ nill. - 0.10 |
- 0, + 3 |
2.2 |
| Notes: |
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| ● Tolerance on Cut Lengths: Up to & including 7.3 M. For Lengths over 7.3 M - Additional Length tolerance of 3 mm will apply for Ea 3 M or fraction up to a maximum of 13 mm. |
| ● Tolerance on Standard Mill Lengths: - 0, + 35 mm. |
| ● Wall thickness may be varied by negotiation with supplier. |
| ● Internal Surface: Tubes shall be manufactured from Cold Rolled 2-B Finish strip ( equavalent to 0.3 µm Ra. Profile of the weld bead shall be continuous with the internal surface of the tube without any evidence of undercut, scoring or noticeable roll marks. |
| ● Contaminants: Tubing shall be manufactured & handled in a manner that will avoid ferrous & other contaminants. |
| ● Defects: Tubes shall be clean & smooth. Shall be free from harmful surface defects, inclusions & longitudinal grooving. |
| ● Heat Treatment: IF called for by purchaser/buyer the tubes shall be annealed. The annealing treatment for the austenitic stainless shall be heating of tubes to 1040 ͦ minimum followed by rapid cooling. Annealing of Duplex stainless may be specified by agreement. |
| ● Testing: Welded Tubes:- Non Destructive Testing - Unless specified by the purchaser/buyer of the type of test to be conducted, The manufacturer at his or her option can carry out either Eddy Current Test or Hydrostatic Test in Accordance with ASTM A-269. Tubes shall be capable of withstanding an internal pressure without leaking to the equation : |
| P = 220.6t/D where: |
| P = pressure. In megapascals. |
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| t = wall thickness. |
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| D = diameter (see Table above) |
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| SSM will not be held responsible for any variation or changes on the figures/details listed above. Please refer to AS 1528.spec which can be secured from ASSDA. |
