What causes a blister in the furnance tube of a firetube boiler. I know it is due to plate lamination but what causes the blister after 20 years of service with no problems ?
The manufacturer says his AI has never asked to review a WPS. They do not have a WPS. ASME Section VIII Div 1, UW 28,2 states" When the welding is any automatic welding process performed in accordance with a Welding Procedure Specification (in compliance with Section IX as far as applicable )...
You may wish to consider 100% UT as an anternative. I understand that Section VIII Div 1 allows UT as a volumetric examination method in lieu of RT without having to use a Code Case as of 1 July.
I have been tasked with developing a training presentation for boiler/pv confined space entry safety procedures. Can anyone direct me to a good reference source ?
A large utility power generation boiler is fitted with nine srv's. There are six fitted on the drum and three on the superheater outlets.One of the superheater srv's was leaking or popped at a low pressure so it was gagged.May this boiler continue to operate with the gagged valve in place if it...
