UA-69298255-1 UA-69298255-2 Blog Little P.Eng. for Engineers Training & Engineering Services

August 9, 2020

The example problem which follows goes through a comprehensive local stress analysis of a vessel/nozzle using WRC 107 criteria. 

In the figure, the user may also notice that there are two nodes occupying the same space at the nozzle/vessel surface junction: nodes 5...

August 6, 2020

The Welding Research Council Bulletin No. 107 (WRC 107) has been used extensively since the mid 60's by design engineers to estimate local stresses in vessel/attachment junctions. 

Welding Research Council Bulletin 107 is a parameterization of the results of a set...

August 6, 2020

Loads from piping attached to vessels induce stresses in the vessel walls, in the form of membrane and bending stresses. These stresses normally must be evaluated against the requirements of the ASME Boiler and Pressure Vessel Code, Section VIII, Division 2. Accurate c...

August 6, 2020

The HEI Standard for Closed Feedwater Heaters provides a method for evaluating the allowable loads on shell type heat exchanger nozzles. This method is a simplification of the WRC Bulletin 107 methodology (discussed in Section 3.4.2 of these seminar notes), in which th...

August 6, 2020

The API 661 Standard for Air Cooled Heat Exchangers for General Refinery Service covers the allowable loads on the vertical, collinear nozzles found on most single- or multi-bundled air cooled heat exchangers. The types of nozzles which may be checked are those which a...

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