WW-H-191E
f. Nominal shell diameter and shell length if other than manufacturer's standard dimensions
(see 3.8.1).
g. When tubes should be seal welded or brazed to tube sheet (see 3.8.3). h. When saddle support should not be provided (see 3.8.5).
i. Orientation and location of nozzles, if other than manufacturer's standard (see 3.8.7). J. When lifting and tiedown attachments are required (see 3.10).
k. Color of finish coat (see 3.11).
l. When repair parts and maintenance tools are required and the parts and quantities to be furnished (see 3.14).
6.3 First article. When a first article inspection is required, the item will be tested and should be a first article sample or it may be a standard production item from the contractor's current inventory as specified in 4.2.1. The first article should consist of one unit. The contracting officer should include specific instruction in acquisition documents regarding arrangements for examination, test, and approval of the first article.
6.4 Sampling procedures.
6.4.1 Sampling for examination. Recommended inspection level is II and AQL is 2.5 percent defective (see 4.4.1).
6.4.2 Sampling for tests. Recommended inspection level is S-3 and AQL is 4.0 percent defective
(see 4.4.2).
6.5 Standards compliance. Prior to approval of the first shipment, the contractor shall submit for the approval of the contracting officer, or his authorized representative, satisfactory evidence that the heater he proposed to furnish under this specification meets the requirements of ASME and TEMA standards.
6.5.1 ASME standard. Acceptable evidence of meeting the requirements of ASME Section VIII, Division 1, shall be the ASME certification stamp or label, or a certified test report from a recognized independent testing laboratory indicating the heater has been tested and conforms to ASME Section VIII, Division 1. Such evidence must be acceptable to the contracting officer.
6.5.2 TEMA standard. Acceptable evidence of meeting the requirements of TEMA shall be the TEMA Registration Plate attached to the heat exchanger, or a certified test report from a recognized independent testing laboratory indicating the heater has been tested and conforms to TEMA standard. Such evidence must be acceptable to the contracting officer.
6.6 Selection guideline. Selection guidelines shown in tables I and II were requirements in
WW-H-191D and were reprinted in this section for information only.
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