6.3.3 Welding procedure tests for cargo tanks and process pressure vessels

  6.3.3.1 Welding procedure tests for cargo tanks and process pressure vessels are required for all butt welds and the test assemblies should be representative of:

For butt welds in plates, the test assemblies should be so prepared that the rolling direction is parallel to the direction of welding. The range of thickness qualified by each welding procedure test should be in accordance with Recognized Standards. Radiographic or ultrasonic testing may be performed at the option of the fabricator or the Administration. Procedure tests for consumables intended for fillet welding should be in accordance with Recognized Standards. In such cases consumables should be selected which exhibit satisfactory impact properties.

  6.3.3.2 The following welding procedure tests for cargo tanks and process pressure vessels should be made from each test assembly:

• .1 Cross-weld tensile tests.

• .2 Transverse bend tests which may be face, root or side bends at the discretion of the Administration. However, longitudinal bend tests may be required in lieu of transverse bend tests in cases where the base material and weld metal have different strength levels.

• .3 One set of three Charpy V-notch impacts, generally at each of the following locations, as shown in figure 6.1:

  Centreline of the welds

  Fusion line (F.L.)

  1 mm from the F.L.

  3 mm from the F.L.

  5 mm from the F.L.

• .4 Macrosection, microsection and hardness survey may also be required by the Administration.