Questions regarding welding issues after internal inspection of the boiler
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My boiler is now ready for an internal inspection. There are two types of pipes to be cut for endoscopic examination: 12Cr1MoV pipes with dimensions of 60*6 mm, and 20G pipes with dimensions of 32*4 mm. I would like to know whether heat treatment is required for both types of pipes after welding. Are there any standards specifying which materials used in boilers, along with their corresponding specifications, require heat treatment and flaw detection after welding? Thank you in advance for your assistance
I wonder what this endoscopy can reveal – crystals, scale buildup? ? ? For such a pipe diameter, if it is inserted into an endoscope through an opening, the required diameter of that opening is likely to be not very large; it can simply be welded shut after use. For reference.
12Cr1MoV requires heat treatment