Specification for design and manufacture of shell boilers of welded construction|Design calculations, Inspection, Acceptance (approval), Boilers, Steam boilers, Grades (quality), Stiffeners, Dimensions, Safety valves, Stress analysis, Heat treatment, Unalloyed steels, Pressure testing, Temperature, Defects, Welded joints, Safety devices, Holes, Dished ends, Leak tests, Test specimens, Structural design, Fire-tube boilers, Non-destructive testing, Pressure, Manganese steels, Fusion welding, Steels, Automatic control systems, Cylindrical shape, Hydraulic tests, Mechanical testing, Welding, Boiler tubes, Boiler stays, Hot-water boilers, Maintenance, Supports, Marking, Thickness, Design