I need to know which coating to use for coating the I.D. of some large diameter (7') cement piping that has been in service for over 20 years. We want the pipe to last for another 20 + years. The pipe handles a high volume of water (110°F max)for a cooling system. Some of the coatings that...
Is PWHT'ing of Carbon Steel Pipe For Anhydrous Ammonia Service just a customer requirement or a particular code requirement? If a code can you tell me which one and what paragraph? Our design temperature is -50°F. If the weld hardness is kept below 200 BHN is it really needed? Thanks for any...
I've had the understanding that austenitic stainless must not be coated with zinc containing products because it will cause hot cracking if the stainless is heated or welded. Is this correct? If so does anyone know of any info. location on this topic? Are there other problems that can occur...
I've heard that failures have occured when welding duplex SS to dissimilar metals using ERNiCrMo-3 due to Nitrogen reduction in the fusion line, because Nb bonds with the Nitrigen. Is this true?
Does anyone know of any published articles on the web that bears this out?
Thanks,
Weldmete
