Standard Guide for Construction of a Sounding Tube and Striker Plate for Tank Sounding
Sounding tubes may be fabricated from 1 ½ NPS or larger. Only when otherwise specified, Schedule 40 components, manufactured from the list of material indicated in Practice F1155 and Specification A53/A53M, Grade S or Grade ERW. In addition, sounding tubes may be fabricated in stainless steel for stainless steel tanks.
Sounding tubes passing through or terminating in fuel tanks, potable water tanks, or clean salt water ballast tanks should be constructed of 70-30 copper nickel, but other suitable material is acceptable.
Striker plates shall be fabricated in accordance with Specification A36/A36M.
The fittings shall be designed in accordance with ANSI B16.5, ANSI B16.9, ANSI B16.28, or ANSI B16.11 as applicable (See Table 21 in Practice F1155), and the installation shall be in accordance with ANSI B31.1 as modified by Specification F722. These standards cover the fitting tolerances.
Some cargo may preclude the use of materials specified in this guide. However, configuration examples are applicable for all applications.
1.1 This guide covers design and construction criteria for striker plates and sounding tubes, excluding deck penetrations and caps, for use with sounding rods or tapes in freshwater, saltwater, and oil tanks.
1.2 The values stated in inch-pound units are to be regarded as the standard. The SI units given in parentheses are for information only.
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
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