TYPES OF EXPANSION JOINTS
The last newsletter discussed how differential thermal expansion in fixed tubesheet exchangers might require an expansion joint. Two types of expansion joints are commonly used in exchangers: flanged and flued…
ASME Code, TEMA and API Facts
Category: ASME Code, TEMA and API Facts
Expansion Joints in Heat Exchangers
In order to exchange heat, a heat exchanger always has a hot side and a cold side. The hotter fluid can be on either the shell or tube side, but the…
Confined Gasket Joints
The TEMA standard requires gasket joints in all Class ‘R’ heat exchangers to be confined type. What is a confined gasket joint? These are joints that have a solid metal…
Vessel Components – Vortex breakers
Vortex breakers are simple devices used to prevent the formation of vortices, or swirling patterns, at the drain nozzle in a tank or pressure vessel. If a vortex forms when…
Explosion Cladding
If a vessel requires thick shells and heads due to the design conditions but also needs the corrosion resistance of an expensive nickel alloy, it could be a very expensive piece of equipment.…
Nozzle Thickness Requirements in UG-45
How does the ASME Code determine how thick nozzles should be? While the standard code calculation for a cylinder under internal pressure often gives minimal requirements—frequently less than 1/16″ for…
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