B58.1-1961(A101-60): American Standard for Vertical Turbine Pumps Part A - Line Shaft Vertical Turbine Pumps (PDF)

The suggested standards are to be considered a minimum requirement for a first-quality vertical turbine pump, but do not preclude the use of more elaborate specifications on the part of either user or manufacturer, nor is it the intent to restrict the use of any equipment not meeting the requirements of this standard should the user not consider such compliance necessary. This standard is applicable primarily to pumps that are constructed of accepted standard materials of the best quality and workmanship.