The American Society Of Mechanical Engineers Website has links to many resources for researching codes and standards. Quoting from the site:
ASME’s Vision, Mission And Core Values Founded in 1880 as the American Society of Mechanical Engineers, today’s ASME is a 120,000-member professional organization focused on technical, educational and research issues of the engineering and technology community. ASME conducts one of the world’s largest technical publishing operations, holds numerous technical conferences worldwide, and offers hundreds of professional development courses each year. ASME sets internationally recognized industrial and manufacturing codes and standards that enhance public safety.