Q. What are Preheat and interpass temperature?

Preheat and interpass temperatures shall be in accordance with the applicable codes. Materials that require preheat for welding shall receive a comparable preheat for thermal gouging and cutting, and tack welding.

The minimum metal temperature for welding shall be 10°C (50°F).

The maximum interpass temperature for austenitic stainless steel shall be 177°C (350°F).

The metal temperature shall be maintained at preheat temperature until weld is completed. An insulation wrap shall be placed around the joint to facilitate slow cooling.

Temperature melting crayons (Tempil-stick or equal) or contact pyrometers shall be used to determine preheat and interpass temperature. Temperature determination will be taken on the opposite side of the heating source.

Posted Date: 7/9/2013 12:49:26 AM | Location : United States

Ask an Expert

Related Discussions:- What are preheat and interpass temperature, Assignment Help, Ask Question on What are preheat and interpass temperature, Get Answer, Expert's Help, What are preheat and interpass temperature Discussions

Write discussion on What are preheat and interpass temperature
Your posts are moderated

Write your message here..

Related Questions

M.o.s, Draw the shear force and bending moment diagrams for overhanging bea... Draw the shear force and bending moment diagrams for overhanging beam subjected to pont load at its free end

Explain principal process for abrasive jet cutting machines, Explain Princi... Explain Principal Process for Abrasive Jet Cutting Machines Abrasive particles are fed from the hopper in to the mixing chamber by regulating device as shown in figure.

Evaluate the least pull, Evaluate the least pull, through the center of whe... Evaluate the least pull, through the center of wheel: A uniform wheel having 600 mm diameter, weighing 5KN rests against rigid rectangular block of 150mm height as shown in t

Hot working and cold working process, different different

What do you mean by centrifugal casting, What do you mean by centrifugal ca... What do you mean by centrifugal casting ? How are the centrifugal method classified ?

Compound BArs, three vertical, parallel straight rods, each 2.6m in length ... three vertical, parallel straight rods, each 2.6m in length have their upper ends firmly secured and their lower supporting a rigid horizontal bar with a weight of 8KN, which cause

Explain the advantages of automation, Explain the Advantages of Automation ... Explain the Advantages of Automation 1. There is an increase in productivity. 2. The unit cost is reduced as larger number of components can be manufactured in shorter time

Determine steady state error, Derive mathematical equation for the time res... Derive mathematical equation for the time response of a first order system subjected to ramp input. Draw the response curve and determine steady state error. Give some examples of

Explain process of casting and modeling, Explain desirable properties of mo... Explain desirable properties of modeling and differentiate between the process of casting and modeling. Also highlight the advantages and disadvantages of casting process and model

Withworth quick return mechanism, its definition, principle, explanation, a... its definition, principle, explanation, application, and a diagram