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FEXLAEquipmentD-01

Air-cooler header box

API 661 plug headers and welded rectangular boxes to VIII-1 Appendix 13.

Where it stops: Nozzle and support loads on the header are not checked here; run a header nozzle on the Nozzles and clips card.

Line drawing of an API 661 plug header: plugsheet with plugs, top plate with nozzle, end plates and section A-A — Fig. 1 · Line drawing of an API 661 plug header: plugsheet with plugs, top plate with nozzle, end plates and section A-A

Choose a method

The quickest first. Each opens with a first page for the job: units, code edition and which checks to run.

01Appendix 13 + shell model
Rectangular box or plug header
App 13 sketches, plug and tube hole rows, stays and partitions, test condition; calculation report.
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Use it for

01Plug and cover-plate headers under internal pressure.
02Membrane and bending at each location, ligaments, end plates, stays, MAWP and the test.
03Welded rectangular pressure boxes and atmospheric tanks.

In pictures

Fig. 2 · The plug header the check reads

How it works

Method notes: API 661 air-cooler headers Worked examples Quick reference