To weld SA387 Gr11 CL2 material
To weld SA387 Gr11 CL2 material
(OP)
How to weld SA387 Gr11 CL2 + SA 240 Gr.321 CLAD with SAW process and heating requirements.
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To weld SA387 Gr11 CL2 material
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To weld SA387 Gr11 CL2 materialTo weld SA387 Gr11 CL2 material(OP)
How to weld SA387 Gr11 CL2 + SA 240 Gr.321 CLAD with SAW process and heating requirements.
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RE: To weld SA387 Gr11 CL2 material
RE: To weld SA387 Gr11 CL2 material
RE: To weld SA387 Gr11 CL2 material
RE: To weld SA387 Gr11 CL2 material
RE: To weld SA387 Gr11 CL2 material
RE: To weld SA387 Gr11 CL2 material
Based on your original post and unfamiliarity with ASME Section VIII Div 1 and Section IX, you need help from a welding engineer in person not in a forum.
RE: To weld SA387 Gr11 CL2 material
RE: To weld SA387 Gr11 CL2 material
One pitfall will be this: the standard 1/8 inch depth specified for back cladding (to match SS321) will NOT be sufficient to achieve equivalent corrosion resistance. Draftsmen seem not to know this, having copied this dimension from one drawing to the next ever since Moses. Unless you have a well controlled, low-dilution two-layer WPS, you will need to allow room for three layers of weld if you plan to avoid corrosion. Three layers will necessitate almost 1/4 inch depth of preparation. Otherwise, in grinding flush with the surrounding base metal, you will grind down into the second layer and possibly even the first (buttering) layer. In any event, welding a large project like this requires something automated and specialized for the task (for both the groove welds and the cladding).
I have butted heads with several WEs over the cladding question, but I have observed many shell courses for SS clad polymer reactors that developed internal rust strips just from sitting out in the weather.
Good luck.
RE: To weld SA387 Gr11 CL2 material
Was base metal subject to impact testing? If not, it should have been.
Recommend to strip back existing clad minimum of 3/8" to preclude dilution of SS into "B2" deposited filler metal when making the strength weld. Clad restoration should have first layer made with 309LCb second layer same or with 347.