Pressure vessels look so glamorous when they sit polished or painted in amongst pipes and equipment, but if people really saw how much work goes into making (and designing) they would be very surprised.
See above 8mm thick 316L stainless steel being plasma cut to an aperture.
This is finished off via polishing to receive a rolled ring to block off a heating/cooling jacket. In essence every edge must be welded to prevent buckling occurring. This is not to mention the nomenclature & paperwork work that goes into being able to weld a piece like this.
Weld Procedure Specification - Must be drawn up to allow the physics to be checked to ensure a weld will be substantial enough for the product/process involved.
Weld Procedure - Must be carried out physically infront of a welding engineer (PCN Lvl II). Then radiographed on "d5" agfa fine film (highest fidelity film for radiography), macro examined, dye penetrant tested & finally tensile tested to destruction.
Welders Qualification - With a procedure done (by your best welder!) you then qualify your other welders in accordance with the procedure with only a radiography required for approval. The qualification lasts around 2 years, and the procedure lasts forever but the procedure welder must be re qualified at 2 year intervals along with all his/her peers.
With a pressure vessel designed to PD5500 (lets forget ASME) you will require all of the above procedures in place to even ponder starting one, unless you want to end up in court or jail for neglegence.
Currently listening to: Washed Out - You & I
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