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ASTM F1437-01

(Practice)

Standard Practice for Inclined Cargo Tank Ladders

Standard Practice for Inclined Cargo Tank Ladders

SCOPE
1.1 This practice provides design, construction, and installation criteria for inclined ladders to be installed within cargo tanks.
1.2 Where ladders are attached to platforms, see Figs. 1 and 2.
1.3 Values stated in SI units are to be regarded as the standard. The values stated in parentheses are provided for information purposes only.

General Information

Status
Historical
Publication Date
09-Nov-2001
ICS
23.020.10 - Stationary containers and tanks
Technical Committee
F25 - Ships and Marine Technology
Drafting Committee
F25.03 - Outfitting and Deck Machinery
Current Stage
Ref Project

Relations

Replaces
ASTM F1437-92 - Standard Practice for Inclined Cargo Tank Ladders
Effective Date
10-Nov-2001
Replaced By
ASTM F1437-06 - Standard Practice for Inclined Cargo Tank Ladders (Withdraw 2010)
Effective Date
01-Dec-2006

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ASTM F1437-01 - Standard Practice for Inclined Cargo Tank LaddersASTM F1437-01 - Standard Practice for Inclined Cargo Tank Ladders
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ASTM F1437-01 - Standard Practice for Inclined Cargo Tank Ladders
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Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn. Contact ASTM
International (www.astm.org) for the latest information.
An American National Standard
Designation: F 1437 – 01
Standard Practice for
1
Inclined Cargo Tank Ladders
This standard is issued under the fixed designation F 1437; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope 4. Significance and Use
1.1 This practice provides design, construction, and instal- 4.1 This practice establishes the procedure for the construc-
lation criteria for inclined ladders to be installed within cargo tion and installation of inclined ladders to be fabricated and
tanks. installed, by the shipyards, within the cargo tanks.
1.2 Where ladders are attached to platforms, see Fig. 1 and
5. Materials and Manufacture
Fig. 2 .
5.1 Materials—(Type I):
1.3 Values stated in SI units are to be regarded as the
standard. The values stated in parentheses are provided for 5.1.1 Stringers—230-mm (approximately 9-in.) by 50-mm
7
(approximately 1 ⁄8-in.) structural channels of carbon steel.
information purposes only.
(See Specification A 36/A 36M.)
2. Referenced Documents
5.1.2 Upper and Lower Clips—Flat bars of carbon steel.
2.1 ASTM Standards: (See Specification A 36/A 36M.)
2
A 36/A 36M Specification for Structural Steel 5.1.3 Handrails and Stanchions—25 mm (approximately 1
2.2 Other Documents: in.) diameter carbon steel. (See Specification A 36/A 36M.)
American Bureau of Shipping Rules for Building and 5.1.4 Treads—75-mm (approximately 3-in.) by 75-mm by
3
3
Classing Steel Vessels 10-mm (approximately ⁄8-in.) structural angles of carbon steel.
American Welding Society Publication, AWS D 1.1 Struc- (See Specification A 36/A 36M.)
4
tural Welding Code—Steel 5.2 Materials—(Type II):
SAE AMS-C-27725 Coatings, Corrosion Preventative, 5.2.1 Stringers—Structural flat bars of carbon steel. (See
Polyurethane, for Aircraft Integral Fuel Tanks for Use to Specification A 36/A 36M.)
5
250 Degrees F (121 Degrees C) 5.2.2 Upper and Lower Clips—Flat bars of carbon steel.
6
Steel Structures Painting Council Specification (See Specification A 36/A 36M.)
5.2.3 Treads—25-mm (approximately 1-in.) by 25-mm
3. Classification
square bars of carbon steel. (See Specification A 36/A 36M.)
3.1 Ladders shall be classified into two types:
5.3 Manufacture:
3.1.1 Type I—Ladders installed within cargo tanks carrying 5.3.1 All welding shall be in accordance with American
cargo other than fuel oil, and
Bureau Shipping Rules for Building and Classing SteelVessels
3.1.2 TypeII—Ladders installed within cargo tanks carrying or AWS D 1.1.
fuel oil.
6. Dimensions
6.1 Dimensions indicated are typical. However, these di-
1
This practice is under the jurisdiction of ASTM Committee F25 on Ships and
mensions can be changed to suit other existing structures.
Marine Technology and is the direct responsibility of Subcommittee F25.03 on
6.2 The tread lengths, or the clear widths, between the
Outfitting.
Current edition approved Nov. 10, 2001. Published January 2002. stringers for Type I ladders, for commercial and naval ships,
2
Annual Book of ASTM Standards, Vol 01.04.
shall be 455 mm (approximately 18 in.) and 610 mm (approxi-
3
Available from American Bureau of Shipping, ABS Plaza, 16855 Northchase
mately 24 in.), respectively.
Dr., Houston, TX 77060.
4
6.3 The tread lengths or clear widths between stringers for
Available from American Welding Society, 550 N.W. LeJeune Rd., Miami, FL
33126.
Type II ladders shall be 380 mm (approximately 15 in.).
5
Available from Standardization Documents Order Desk, Naval Sea Systems
6.4 The lengths of the ladder shall be fabricated to suit
Command,SEA03R42,2531JeffersonDavisHighway,Arlington,VA22242–5160.
6 existing requirements.
Available from Steel Structures Painting Council, 40 24th St., 6th Floor,
1
6.5 Tolerance shall be 66 mm (approximately ⁄4 in.).
Pittsburgh, PA 15222–4656.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1

---------------------- Page: 1 ----------------------
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn. Contact ASTM
International (www.astm.org) for the latest information.
F 1437 – 01
FIG. 1 Type I Ladder Elevation
6.6 Type I ladders shall have the following dimensions: matelyequaltothenormaltreadspacing;andthedistancefrom
installed angle: 50 to 69° from the horizontal; tread depth: 175 the bottom tread to the lower walking surface is not to exceed
to 250 mm (approximately 7 to 10 in.) at 50°, tapering to 75 375 mm (approximately 15 in.).
mm (approximately 3 in.) at 69°; riser height 175 to 300 mm
7. Workmanship, Finish, and Appearance
1
(approximately 7 to 12 i
...

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Defines the key terminology used in this guide  
Section 4:  
Describes the significance and use of this guide  
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Tank System Design and Installation    
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Tank System Closure  
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UST Management Practice and Operator Training  
Appendix X1:  
Recurring Release Det...

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1.1 This guide covers procedures to be implemented prior to the application of cathodic protection for evaluating the suitability of a tank for upgrading by cathodic protection alone.  
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This specification covers flat-bottom, upright, cylindrical tanks molded in one-piece seamless construction by rotational molding. The tanks are molded from polyethylene for above ground, vertical installation and are capable of containing aggressive chemicals at atmospheric pressure. This specification does not cover the design of vessels intended for use at pressures other than atmospheric pressure. Furthermore, this specification does not cover the design of portable tanks and is not for vessels intended for use with liquids heated above their flash points in continuous service. Special design considerations not covered in this specification shall be given to vessels subject to superimposed mechanical forces, such as seismic forces, wind load or agitation; to vessels subject to service above specified temperature; and vessels subject to specified superimposed pressure of water. Low-temperature impact test shall be performed on rotational-molded polyethylene tanks. The test method is used on tanks molded from both the crosslinked and non-crosslinked polyethylenes. Dart drop impact test shall be performed to determine the quality of the tank. O-xylene-insoluble fraction or gel test shall be performed on crosslinked polyethylene. Visual inspection and water test shall also be performed on the samples.
SCOPE
1.1 This specification covers flat-bottom, upright, cylindrical tanks molded in one-piece seamless construction by rotational molding. The tanks are molded from polyethylene for above ground, vertical installation and are capable of containing aggressive chemicals at atmospheric pressure. Included are requirements for materials, properties, design, construction, dimensions, tolerances, workmanship and appearance. Tank capacities are from 1900 L (500 gal) up.  
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1.2.1 NFPA Standards 30 and NFPA 31 shall be consulted for installations that are subject to the requirements of these standards.  
1.3 For service requirements beyond the scope of this specification (1.2), such as externally imposed mechanical forces, internal pressure or vacuum, higher temperature service, etc., other relevant sources of standards, for example, local and state building codes, NFPA, ASME, ARM, etc., shall be consulted.  
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Note 1: ISO 13341:2005+A1:2011 and ISO 13575:2012 are similar, but not equivalent to this standard.  
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Standard Practice for Measuring the Ultrasonic Velocity in Polyethylene Tank Walls Using Lateral Longitudinal (LCR) Waves

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This practice covers a procedure for measuring the ultrasonic velocities in the outer wall of polyethylene storage tanks. The practice is intended for application to the outer surfaces of the wall of polyethylene tanks. An angle beam lateral longitudinal (LCR) wave is excited with wedges along a circumferential chord of the tank wall. A digital ultrasonic flaw detector is used with sending-receiving search units in through transmission mode. The observed velocity is temperature corrected and compared to the expected velocity for a new, unexposed sample of material, which is the same as the material being evaluated. The difference between the observed and temperature corrected velocities determines the degree of UV exposure of the tank.
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5.1 Measuring the velocity of ultrasound in materials is a unique method for determining nondestructively the physical properties, which can vary due to both manufacturing processes and environmental attack. Velocity is directly related to the elastic moduli, which can vary based on environmental exposure and manufacturing process, The LCR method described herein is able to measure the velocity between two adjacent points on a surface and therefore is independent of the conditions on the opposite wall. Applications of the method beyond polymer tanks will undoubtedly be developed and examination may occur in the production line as well as in the in-service mode.
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1.1 This practice covers a procedure for measuring the ultrasonic velocities in the outer wall of polyethylene storage tanks. An angle beam lateral longitudinal (LCR) wave is excited with wedges along a circumferential chord of the tank wall. A digital ultrasonic flaw detector is used with sending-receiving search units in through transmission mode. The observed velocity is temperature corrected and compared to the expected velocity for a new, unexposed sample of material which is the same as the material being evaluated. The difference between the observed and temperature corrected velocities determines the degree of UV exposure of the tank.  
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1.6 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.

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5.3 The procedures for sampling tanks using a COLIWASA, liquid profiler sampler, bacon bomb sampler, and peristaltic pump and tubing are delineated.
SCOPE
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