ASME B31.3 Limitations on Miscellaneous Joints
Caulked and soldered joints are only permitted in Category D Fluid Service. Caulked joints are further limited to a maximum temperature of 93°C (200°F), and provisions are required to prevent disengagement of the joints and resist the effects of longitudinal forces due to internal pressure. With soldered joints, the low melting point of solder is to be considered where possible exposure to fire or elevated temperature is involved. Brazed and braze-welded joints are permitted