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QUALITY STANDARD<br />
AND NDE<br />
Dewrance has rationalised the various international NDE<br />
standards and developed its own standard quality plans<br />
for each different level of inspection.<br />
Applicable Dewrance Quality Levels<br />
Valve Type Body Nominal Size<br />
Acceptance Standards<br />
Ultrasonic Examination:<br />
To ASME B16.34. Annex E.<br />
Magnetic Particle:<br />
To ASME B16.34 Annex C.<br />
Visual Inspection MSS SP 55:<br />
Radiography Radiographic<br />
examination is available as<br />
an optional extra, details<br />
available on request.<br />
Valve Rating (Class)<br />
150 – 600 900 1500<br />
2500<br />
& above<br />
ASME B16.34 Forged 15mm – 100mm S9 S9 S9 S9<br />
Standard Class Cast 125mm & above S9 S7 S7 S7<br />
ASME B16.34 Forged 15mm – 100mm S8 S8 S8 S8<br />
Special Class Cast 125mm & above S8 S8 S8 S8<br />
Standard Levels of NDE Coverage<br />
Standard Magnetic<br />
Visual<br />
Quality<br />
Particle<br />
Inspc.<br />
Plan<br />
Inspection<br />
Ultrasonic Equivalent<br />
Inspection Standard<br />
S7 100%<br />
B.W. <strong>Ends</strong><br />
Change Sect.<br />
B.W. <strong>Ends</strong> –<br />
ASME B16.34<br />
Standard Class 900+<br />
S8 100% 100% B.W. <strong>Ends</strong><br />
Pressure Seal<br />
area & change<br />
of section*<br />
ASME B16.34<br />
Special Class<br />
ESI 56/1 Lev. 6<br />
S9 100% – – –<br />
ASME B16.34<br />
Std. Class Forged<br />
up to 600 Class Cast<br />
*As defined in Section 8 of ASME B16.34<br />
Typical Coverage Areas (other than 100%)<br />
7
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