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Significance and Use
5.1 Sounding tubes may be fabricated from 11/2 NPS or larger. Only when otherwise specified, Schedule 40 components, manufactured from the list of material indicated in Practice and Specification , Grade S or Grade ERW. In addition, sounding tubes may be fabricated in stainless steel for stainless steel tanks.
5.1.1 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.
5.2 Striker plates shall be fabricated in accordance with Specification .
5.3 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 ), and the installation shall be in accordance with ANSI B31.1 as modified by Specification . These standards cover the fitting tolerances.
5.4 Some cargo may preclude the use of materials specified in this guide. However, configuration examples are applicable for all applications.
5.5 When a sounding tube is combined with the air escape, either three 11/4-in. (approximately 30-mm) diameter holes approximately 12 in. (305 mm) from the tank top equally spaced or six 1/2-in. (approximately 15-mm) diameter holes approximately 6 in. (150 mm) from the tank top equally spaced can be used for perforations. See .
5.6 are guidance details.
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 standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.
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.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
A36/A36M Specification for Carbon Structural Steel
A53/A53M Specification for Pipe, Steel, Black and Hot-Dipped, Zinc-Coated, Welded and Seamless
F722 Specification for Welded Joints for Shipboard Piping Systems
F1155 Practice for Selection and Application of Piping System Materials
ANSI StandardsANSI B16.11 Forged Steel, Socket Welding and Threaded Fittings ANSI B16.28 Wrought Steel, Butt Welding, Short Radius Elbows and Return ANSI B16.5 Pipe Flanges and Flange Fittings ANSI B16.9 Factory Made Wrought Steel Butt Welding Fittings ANSI B31.1
ABS StandardABS Rules for Building and Classing Steel Vessels
AWS StandardAWS D1.1
ICS Number Code 23.020.99 (Other fluid storage devices)
UNSPSC Code 25111900(Marine craft systems and subassemblies)
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ASTM F1386-92(2016)e1, Standard Guide for Construction of Sounding Tube and Striker Plate for Tank Sounding, ASTM International, West Conshohocken, PA, 2016, www.astm.orgBack to Top