MIL-DTL-16356E
3.15 Designation and marking.
3.15.1 Water level marker. A marker shall be furnished with each gauge labeled "Normal Water Level." The
marker shall be complete with simple means of mounting on gauge frame. Markers shall not be required with
replacement frames. Level indicating plates, numbered in inches (plus + and minus -) to identify water level below
and above the "N" (Normal Water Level) marker, shall be supplied when specified (see 6.2). There shall be one
plate for each gauge segment.
3.15.2 Identification plates. Identification plates and other designating markings shall be furnished. Plates
shall be installed on and furnished as part of the boiler-water gauge for which they are intended. They shall be
attached to a part of the water gauge which shall not ordinarily be removed during the normal service life, and shall
be located in a readily accessible position where they can be read at all times without danger to personnel. Data
marked on identification plates shall include the following:
a. Manufacturer s name, design rating, National Stock Number (NSN), manufacturer s contract number, and
date of manufacture.
Blank space for inspector s official stamping.
b.
c.
Specification of shut-off valve as Upper or Lower.
d.
Specification of shut-off valve as Right Hand (RH) or Left hand (LH).
3.15.3 Bolt head marking (type A, class IV gauges). Bolt assemblies with captive spring cone washers shall be
marked with the manufacturer s symbol and lot number on the top surface of the bolt head. The lot number marking
shall define the heat treatment lot of the spring cone washers as well as the lot of the bolt assembly. Markings shall
be permanent, as defined in MIL-STD-792, and clearly visible on the finished bolt.
3.16 Tools. For Type A gauges, a kit of tools shall be furnished for each fireroom of the ship for which the
gauges are furnished. This kit shall be furnished in a pocketed roll-up kit or in a metal box. One each of all special
tools required for assembly or for normal maintenance, repair, and adjustment of the gauges shall be furnished
(see 6.10.1).
3.17 Cleaning. Material shall be cleaned so that all surfaces shall be free of corrosion oil, grease, and all other
foreign residues. Cleaning shall be accomplished in any manner that will accomplish thorough cleaning without
damage to the gauges or gauge parts. Surfaces shall be examined visually to determine freedom from dirt,
corrosion, oil, grease, or foreign residue. Preservatives shall not be used on parts that are vulnerable to damage by
contact preservatives. When specified (see 6.2), a tag shall accompany each item with the following note: "Prior to
installation, this item shall be cleaned in accordance with MIL-STD-767 or 0989-064-3000 to suit the ship system
cleanliness requirement." Cleaning in accordance with MIL-STD-767 or 0989-064-3000 is not required unless
specified (see 6.2). Spring cone washers shall be vapor degreased or solvent cleaned, followed by mechanical
scrubbing with mild abrasive cleaners prior to heat treatment. All traces of cleaners shall be removed by rinsing
thoroughly with warm water. A light, tightly adherent, uniform appearing oxide after heat treatment is evidence of
proper cleaning.
3.18 Detrimental material requirements. Material supplied under this document shall not contain, and shall not
be contaminated by, mercury or mercury compounds. The detrimental material requirements of MIL-DTL-24696
apply to gasket and spacer materials supplied under this document. When specified (see 6.2), packing material in
accordance with 3.10.5 shall be supplied Grade N (nuclear).
3.19 Toxicity. When evaluated in accordance with 4.8 (the HHA), the material shall have no adverse effect on
3.20 Workmanship. Gauges shall be uniform, clean, smooth, free of grooves, indentations, cracks or blisters,
or any imperfection that might impair serviceability.
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