We offer the following links for your convenience. National Board of Boiler and Pressure Vessel Inspectors American Society of Mechanical Engineers(ASME) American Welding Society Standards and Publications While we hope you will enjoy the information presented in these sites, AD & D Welding and Boiler Works accepts no responsibility for either the content, design, or purposes of the sites themselves. For suggestions, comments, and other inquiries, viewers are advised to contact the administrators of the individual sites themselves.