Welding Fabrication Standards - EWF
Welding Fabrication Standards - EWF
Welding Fabrication Standards - EWF
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<strong>Welding</strong> <strong>Fabrication</strong> <strong>Standards</strong> Page 54<br />
− technical requirements are developed from the principle of fracture mechanics and from<br />
operating experiences (only applicable to C, C-Mn and low alloy ferritic steels with a specified<br />
minimum yield strength of 460 N/mm);<br />
− technical requirements are derived by the application of a fracture mechanics analysis (to be<br />
used only in agreement with the parties concerned).<br />
Maximum values for the Carbon, Sulphur and Silicon content are provided depending on the<br />
considered material (see Table 12).<br />
Material<br />
Maximum content of cast analisys<br />
%C %S %P<br />
Steel 0,23 0,025 0,035<br />
Ferritic stainless steels 0,08 0,015 0,040<br />
Martensitic stainless steels 0,06 0,015 0,040<br />
Austenitic stainless steels 0,08 0,015 0,045<br />
Austenitic stainless steels 0,10 0,015 0,035<br />
Austenitic-ferritic stainless<br />
steels<br />
0,030 0,015 0,035<br />
Table 12 – Maximum content of alloying element for steels<br />
Special provisions are also given as relates to lamellar tearing, design temperature above 20°C,<br />
prevention of brittle fracture, fasteners and lined piping.<br />
Figure 15 – Stocking of pipes and fittings<br />
The marking of the products or delivery units shall ensure traceability between the product or<br />
delivery unit and the inspection documents. For European standardised materials, the marking<br />
Istituto Italiano della Saldatura Lungobisagno Istria, 15 - 16141 Genova (I) - Tel. 01083411 - Fax 0108367780
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