What is the coldest ambient temperature allowed for welding carbon steel and stainless steel pipes and structure?
Stainless steel pipes Inoxtech.com, Duplex, clad, carbon & low alloy steel welded pipes in large diameter and heavy wall in 12 m unit length
Stainless steel pipes, Duplex, clad, carbon & low alloy steel welded pipes in large diameter and heavy wall in 12 m unit length.
InoxTech.com is GOST R Certified
14/06/2010
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Whenever ambient temperature causes water vapor condensation upon metals, it is recommended good practice to preheat before welding up to 120 C to make sure the joints are dry. A few authorities, specifying the conditions for welding of Bridges and similar Structures, put the coldest ambient temperature limit, below which welding is not allowed, at 0 0F or -18 0C.See:http://www.thruway.state.ny.us/business/design-manual/appendixf.pdf(page 12) and http://www.dot.state.oh.us/testlab/StructuralSteel/Field-Welding-Inspection-Guide.pdf (page 9) Other authorities, dealing with welding requirements for Piping and Pressure Vessels, put the coldest ambient temperature limit, below which welding is not allowed, at 32 0F or 0 0C.See: http://www.wbdg.org/ccb/NASA/NASAASC/NS15055.pdf(page 6) For ASME Codes and Standards, the minimum temperature for welding is generally specified at 50 0F or 10 0C. Minimum temperature and preheat requirements for welding on pressure retaining items are also referenc
