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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 ASME B16.5, ASME B16.9, ASME B16.28, or ASME B16.11 as applicable (see Table 21 in Practice ), and the installation shall be in accordance with ASME 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.
FIG. 1 Type I Sounding Tube
FIG. 2 Type II Sounding Tube
FIG. 3 Type III Sounding Tube
FIG. 4 Type IV Sounding Tube
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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
ASME StandardsASME B16.11 Forged Fittings, Socket-Welding and Threaded ASME B16.28 Wrought Steel Buttwelding Short Radius Elbows and Returns ASME B16.5 Pipe Flanges and Flanged Fittings: NPS 1/2 through NPS 24 Metric/Inch Standard ASME B16.9 Factory-Made Wrought Buttwelding Fittings ASME B31.1 Power Piping
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
ABS StandardABS Rules for Building and Classing Steel Vessels
AWS StandardAWS D1.1 Structural Welding Code
ICS Number Code 23.020.99 (Other fluid storage devices)
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ASTM F1386-92(2021), Standard Guide for Construction of Sounding Tube and Striker Plate for Tank Sounding, ASTM International, West Conshohocken, PA, 2021, www.astm.orgBack to Top