ASTM F1142-19

Standard Specification for Manhole Cover Assembly, Bolted, Semi-Flush, Oiltight and Watertight

ABSTRACT
This specification provides the design and construction criteria for a semi-flush bolted oiltight and watertight manhole cover assemblies that are subjected to lateral pressures such as resulting from vehicle loads or hydrostatic pressures, and used in decks or bulkheads requiring manhole covers that are not required to be completely flush. Manhole cover assemblies shall be complete with covers, mounting rings, gaskets, welded studs, washers, and nuts. This specification does not address certain hazardous cargos, as well as the design of the manhole cover assembly for primary or cyclic loads.
SCOPE
1.1 This specification provides design and construction criteria for a semi-flush, oiltight and watertight bolted manhole cover assembly.  
1.2 The manhole cover assembly depicted in this specification is for use in decks or bulkheads requiring oiltight and watertight covers that are not required to be completely flush. Manhole cover assemblies shall be complete with covers, mounting rings, gaskets, welded studs, washers, and nuts.  
1.3 Handles, if required, shall be as specified in the ordering information.  
1.4 This specification is not applicable to certain hazardous cargos (see Section 46 CFR 153.254 and 46 CFR 154.340).  
1.5 This specification provides design and construction for manhole cover assemblies subjected to lateral pressures such as resulting from vehicle loads or hydrostatic pressures. Where manhole cover assemblies are subjected to primary or cyclic loads, other reinforcement or construction criteria may be necessary to integrate the manhole assembly with the required structural reinforcement for openings in decks or bulkheads. Design of the manhole cover assembly for primary or cyclic loads is beyond the scope of this specification.  
1.6 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.  
1.7 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.

General Information

• Status: Published
• Publication Date: 30-Nov-2019
• ICS: 47.020.10 - Hulls and their structure elements
• Technical Committee: F25 - Ships and Marine Technology
• Drafting Committee: F25.03 - Outfitting and Deck Machinery

Relations

• Replaces: ASTM F1142-98(2012) - Standard Specification for Manhole Cover Assembly, Bolted, Semi-Flush, Oiltight and Watertight
• Effective Date: 01-Dec-2019
• Refers: ASTM D6251/D6251M-23 - Standard Specification for Wood-Cleated Panelboard Shipping Boxes
• Effective Date: 01-Oct-2023
• Refers: ASTM B36/B36M-23 - Standard Specification for Brass Plate, Sheet, Strip, And Rolled Bar
• Effective Date: 01-Oct-2023
• Refers: ASTM D6251/D6251M-19 - Standard Specification for Wood-Cleated Panelboard Shipping Boxes
• Effective Date: 01-Aug-2019
• Refers: ASTM D6880/D6880M-19 - Standard Specification for Wood Boxes
• Effective Date: 01-Aug-2019
• Refers: ASTM B36/B36M-18 - Standard Specification for Brass Plate, Sheet, Strip, And Rolled Bar
• Effective Date: 01-Oct-2018
• Refers: ASTM A131/A131M-14 - Standard Specification for Structural Steel for Ships
• Effective Date: 01-Oct-2014
• Refers: ASTM A131/A131M-13 - Standard Specification for Structural Steel for Ships
• Effective Date: 01-Nov-2013
• Refers: ASTM B36/B36M-13 - Standard Specification for Brass Plate, Sheet, Strip, And Rolled Bar
• Effective Date: 01-Oct-2013
• Refers: ASTM F783-88(2013) - Standard Specification for Staple, Handgrab, Handle, and Stirrup Rung
• Effective Date: 01-May-2013
• Refers: ASTM A36/A36M-12 - Standard Specification for Carbon Structural Steel
• Effective Date: 01-Nov-2012
• Refers: ASTM D5168-12 - Standard Practice for Fabrication and Closure of Triple-Wall Corrugated Fiberboard Containers
• Effective Date: 01-May-2012
• Refers: ASTM D5118/D5118M-12 - Standard Practice for Fabrication of Fiberboard Shipping Boxes
• Effective Date: 01-Apr-2012
• Refers: ASTM D6880/D6880M-11 - Standard Specification for Wood Boxes
• Effective Date: 01-Apr-2011
• Refers: ASTM D6251/D6251M-11 - Standard Specification for Wood-Cleated Panelboard Shipping Boxes
• Effective Date: 01-Apr-2011

Overview

ASTM F1142-19 is the Standard Specification for Manhole Cover Assembly, Bolted, Semi-Flush, Oiltight and Watertight, published by ASTM International. This specification provides comprehensive requirements for the design, construction, and performance of semi-flush bolted manhole cover assemblies that must be both oiltight and watertight. These assemblies are primarily used on decks and bulkheads in marine and industrial environments, especially where the installed covers are not required to be completely flush but must withstand lateral loads such as vehicle movement or hydrostatic pressure. The specification ensures that manhole cover assemblies offer reliable sealing, structural integrity, and standardized components for their intended applications.

Key Topics

• Scope and Applicability:
  ASTM F1142-19 covers semi-flush, bolted manhole cover assemblies designed to be oiltight and watertight. These are used on decks and bulkheads and are suitable where flush mounting is not critical but tight sealing and strength are required.

• Included Components:
  The standard describes assemblies that must be supplied complete with covers, mounting rings, gaskets, welded studs, washers, and nuts.

• Performance Criteria:
  Assemblies are designed for lateral loads, including those originating from vehicle traffic and hydrostatic pressures. The standard does not cover applications subject to primary or cyclic loads, or those intended for hazardous cargoes.

• Classification:

  • Types are defined by access opening size.
  • Grades specify cover plate thickness.
  • Classes identify different corrosion protection: abrasive blasting and coated (Class A) or galvanized finish (Class B).

• Material and Manufacture:
  Specific references are made to relevant ASTM and ANSI/ASME standards for plate and bar materials, coatings, fasteners, and gaskets.

• Testing and Certification:
  Each assembly must be pressure-tested to 1.5 times its design rating and certified for watertight and oiltight integrity.

• Marking and Packaging:
  Products are marked for traceability and packaged for safe transportation and storage, with special provisions for government and military procurement.

Applications

• Marine Vessels:
  Used on ship decks and bulkheads to provide reliable access while maintaining the required oiltight and watertight seals. Ideal for use where complete flush installation is not mandated.

• Industrial Tanks:
  Frequently installed on storage tanks or vessels where robust sealing against oil and water ingress or egress is essential.

• Infrastructure:
  Applied in situations such as oil refineries, chemical plants, and wastewater facilities where both access and containment are critical.

• Specialized Government Use:
  The specification includes detailed packaging and gasket requirements for Department of Defense (DoD) applications, ensuring suitability for demanding environments and transportation scenarios.

Related Standards

• ASTM A36/A36M – Specification for carbon structural steel
• ASTM A131/A131M – Structural steel for ships
• ASTM A153/A153M – Hot-dip zinc coating on iron and steel hardware
• ASTM B36/B36M – Brass plate, sheet, strip, and rolled bar
• ASTM D2000 – Classification system for rubber products
• ASME B1.1 – Unified inch screw threads
• ASME B18.2.1 – Square and hex bolts and screws
• ABS Steel Vessel Rules – For construction and classing of marine vessels

Practical Value

Organizations implementing ASTM F1142-19 benefit from standardized, reliable, and tested manhole cover assemblies that meet strict performance and quality criteria for marine and industrial applications. Following this standard supports operational safety, reduces maintenance, and ensures compliance with national and international regulations for oiltight and watertight access solutions.

Standards Content (Sample)

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.
Designation:F1142 −19 An American National Standard
Standard Specification for
Manhole Cover Assembly, Bolted, Semi-Flush, Oiltight and
Watertight
This standard is issued under the fixed designation F1142; 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 (´) indicates an editorial change since the last revision or reapproval.
1. Scope 2. Referenced Documents
2.1 ASTM Standards:
1.1 This specification provides design and construction
A36/A36M Specification for Carbon Structural Steel
criteria for a semi-flush, oiltight and watertight bolted manhole
A131/A131M Specification for Structural Steel for Ships
cover assembly.
A153/A153M Specification for Zinc Coating (Hot-Dip) on
1.2 The manhole cover assembly depicted in this specifica-
Iron and Steel Hardware
tion is for use in decks or bulkheads requiring oiltight and
B36/B36M Specification for Brass Plate, Sheet, Strip, And
watertight covers that are not required to be completely flush.
Rolled Bar
Manhole cover assemblies shall be complete with covers,
D1974/D1974M Practice for Methods of Closing, Sealing,
mounting rings, gaskets, welded studs, washers, and nuts.
and Reinforcing Fiberboard Boxes
D2000 Classification System for Rubber Products in Auto-
1.3 Handles, if required, shall be as specified in the ordering
motive Applications
information.
D5118/D5118M PracticeforFabricationofFiberboardShip-
1.4 This specification is not applicable to certain hazardous
ping Boxes
cargos (see Section 46 CFR 153.254 and 46 CFR 154.340).
D5168 Practice for Fabrication and Closure of Triple-Wall
Corrugated Fiberboard Containers
1.5 This specification provides design and construction for
D6251/D6251M Specification forWood-Cleated Panelboard
manholecoverassembliessubjectedtolateralpressuressuchas
Shipping Boxes
resulting from vehicle loads or hydrostatic pressures. Where
D6880/D6880M Specification for Wood Boxes
manhole cover assemblies are subjected to primary or cyclic
F783 Specification for Staple, Handgrab, Handle, and Stir-
loads, other reinforcement or construction criteria may be
rup Rung
necessary to integrate the manhole assembly with the required
2.2 ASME Standards:
structural reinforcement for openings in decks or bulkheads.
B1.1 Unified Inch Screw Threads, UN and UNR Thread
Design of the manhole cover assembly for primary or cyclic
Form
loads is beyond the scope of this specification.
Y14.5 Dimensioning and Tolerancing
1.6 The values stated in inch-pound units are to be regarded
B18.2.1 Square, Hex, Heavy Hex, and Askew Head Bolts
as standard. The values given in parentheses are mathematical
and Hex, Heavy Hex, Hex Flange, Lobed Head, and Lag
conversions to SI units that are provided for information only
Screws (Inch Series)
and are not considered standard.
2.3 ABS Standard:
Rules for Building and Classing Steel Vessels
1.7 This international standard was developed in accor-
2.4 NACE Standard:
dance with internationally recognized principles on standard-
NACE No. 2/SSPC-SP10 Near-White Metal Blast Cleaning
ization established in the Decision on Principles for the
Development of International Standards, Guides and Recom-
mendations issued by the World Trade Organization Technical
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Barriers to Trade (TBT) Committee.
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
Available from American Society of Mechanical Engineers (ASME), ASME
This specification is under the jurisdiction of ASTM Committee F25 on Ships International Headquarters, Two Park Ave., New York, NY 10016-5990, http://
and Marine Technology and is the direct responsibility of Subcommittee F25.03 on www.asme.org.
Outfitting and Deck Machinery. Available from American Bureau of Shipping (ABS), ABS Plaza, 16855
Current edition approved Dec. 1, 2019. Published January 2020. Originally Northchase Dr., Houston, TX 77060, http://www.eagle.org.
approved in 1998. Last previous edition approved in 2012 as F1142 – 98 (2012). Available from NACE International (NACE), 15835 ParkTen Pl., Houston,TX
DOI: 10.1520/F1142-19. 77084, http://www.nace.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
F1142−19
2.5 Code of Federal Regulations Standard: 6.5 Heavy hex nuts shall be ⁄4-in. (19.05-mm) 10 UNC-2B
CFR 46 Code of Federal Regulations and manufactured of yellow brass, Specification B36/B36M.
Threads in nuts shall conform to the dimensions for coarse
3. Terminology
threads with tolerances prescribed in ASME B1.1. The nuts
shall conform to dimensions prescribed in ASME B18.2.1.
3.1 Definitions:
3.1.1 manhole, n—an accessway located in a tank structure.
6.6 Unless otherwise specified in ordering information,
3.1.2 semi-flush, n—placement of the cover over the ringed gasket shall be rubber, ⁄16 in. (4.8 mm) thick, 50 6 5
opening (without coaming). durometer prescribed in accordance with Classification System
D2000 5BC507 A14 E034. Manhole cover assemblies for
4. Classification
government application, see Annex A2 for type of gasket.
4.1 Type I—15- by 23-in. (381- by 584-mm) size of access
6.7 Welding shall conform to the latest issue of the ABS
opening. Type II—18- by 24-in. (457- by 610-mm) size of
Rules for Building and Classing Steel Vessels or other classi-
access opening.
fication society rules as may be applicable.
4.2 Grade 1— ⁄4-in. (6.35-mm) thick cover plate. Grade
6.8 Details of bolted manhole cover assembly are shown in
3 1
2— ⁄8-in. (9.5-mm) thick cover plate. Grade 3— ⁄2-in. (12.7-
Fig. 1.
mm) thick cover plate.
7. Dimensions
4.3 Class A Manhole Cover Assemblies—Class A manhole
7.1 Dimensions of manhole cover assembly shall be as
cover assemblies shall be abrasive blasted to near-white metal
indicated in Table 1.
in accordance with NACE No. 2/SSPC-SP 10, and a commer-
cial marine quality, nonhazardous, corrosion-inhibiting, and 1
7.2 For plating up to and including ⁄4-in. (6.4-mm)
oil-resistant primer coating be applied for protection for a 1
thickness, use cover plate of ⁄4-in. (6.4-mm) thickness. Plating
period of one year during shipping and in shipyard handling.
1 3
over ⁄4 in. (6.4 mm) up to, and including ⁄8-in. (9.5-mm)
thickness, use cover plate of ⁄8-in. (9.5-mm) thickness. Plating
4.4 Class B Manhole Cover Assemblies—Class B manhole
3 1
over ⁄8-in. (9.5-mm) thickness, use cover plate of ⁄2-in.
cover assemblies shall be galvanized in accordance with
(12.7-mm) thickness.
Specification A153/A153M.
8. Workmanship, Finish, and Appearance
5. Ordering Information
8.1 Items produced under this specification shall be free of
5.1 The purchasers ordering information shall include the
splinters, sharp edges, burrs, projections, and weld spatters.
following:
5.1.1 ASTM designation and year of issue,
9. Sampling
5.1.2 Type (see 4.1),
9.1 For orders for one or two manhole cover assemblies,
5.1.3 Grade (see 4.2),
each manhole cover assembly shall be inspected.
5.1.4 Class (see 4.3),
5.1.5 Quantity,
9.2 For orders for three to ten manhole cover assemblies,
5.1.6 Remarks—Handles (are/are not) required,
two manhole cover assemblies shall be selected at random. If
5.1.7 Approval—Classification Society approval (is/is not)
any one of them fails to meet requirements, then all manholes
required, and
in the order shall be inspected.
5.1.8 Gasket, if other than specified (see 6.6).
9.3 For orders for more than ten manhole cover assemblies,
they shall be separated into groups of ten (or fraction thereof)
6. Materials and Manufacture
for sampling purposes.
6.1 PlateforthecoverandtheringshallbeofSpecifications
A36/A36M or A131/A131M steel.
10. Inspection and Testing
6.2 Round bar for the handle shall be in accordance with
10.1 Responsibility—Unless otherwise specified in the
Specification F783, Type A.
order, the manufacturer is responsible for the performance of
3 all inspection and testing specified herein. The manufacturer
6.3 Welded studs shall be ⁄4-in. (19.05-mm) 10 UNC-2Aby
may use his own facilities or any commercial facility accept-
1 ⁄4 in. (44.4 mm) long and manufactured of ordinary steel to
able to the purchaser. The purchaser reserves
...

This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: F1142 − 98 (Reapproved 2012) F1142 − 19 An American National Standard
Standard Specification for
Manhole Cover Assembly, Bolted, Semi-Flush, Oiltight and
Watertight
This standard is issued under the fixed designation F1142; 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 (´) indicates an editorial change since the last revision or reapproval.
1. Scope
1.1 This specification provides design and construction criteria for a semi-flush, oiltight,oiltight and watertight bolted manhole
cover assembly.
1.2 The manhole cover assembly depicted in this specification is for use in decks or bulkheads requiring oiltight and watertight
covers that are not required to be completely flush. Manhole cover assemblies shall be complete with covers, mounting rings,
gaskets, welded studs, washers, and nuts.
1.3 Handles, if required, shall be as specified in the ordering information.
1.4 The values stated in inch pound units are to be regarded as the standard. The values given in parentheses are for information
only.
1.4 This specification is not applicable to certain hazardous cargos (see Section 46 CFR 153.254 and 46 CFR 154.340).
1.5 This specification provides design and construction for manhole cover assemblies subjected to lateral pressures such as
resulting from vehicle loads or hydrostatic pressures. Where manhole cover assemblies are subjected to primary or cyclic loads,
other reinforcement or construction criteria may be necessary to integrate the manhole assembly with the required structural
reinforcement for openings in decks or bulkheads. Design of the manhole cover assembly for primary or cyclic loads is beyond
the scope of this specification.
1.6 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.
1.7 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
2.1 ASTM Standards:
A36/A36M Specification for Carbon Structural Steel
A131/A131M Specification for Structural Steel for Ships
A153/A153M Specification for Zinc Coating (Hot-Dip) on Iron and Steel Hardware
B36/B36M Specification for Brass Plate, Sheet, Strip, And Rolled Bar
D1974/D1974M Practice for Methods of Closing, Sealing, and Reinforcing Fiberboard Boxes
D2000 Classification System for Rubber Products in Automotive Applications
D5118/D5118M Practice for Fabrication of Fiberboard Shipping Boxes
D5168 Practice for Fabrication and Closure of Triple-Wall Corrugated Fiberboard Containers
D6251/D6251M Specification for Wood-Cleated Panelboard Shipping Boxes
D6880/D6880M Specification for Wood Boxes
F783 Specification for Staple, Handgrab, Handle, and Stirrup Rung
This specification is under the jurisdiction of ASTM Committee F25 on Ships and Marine Technology and is the direct responsibility of Subcommittee F25.03 on
Outfitting and Deck Machinery.
Current edition approved June 1, 2012Dec. 1, 2019. Published October 2012January 2020. Originally approved in 1998. Last previous edition approved in 20072012 as
F1142 – 98 (2007).(2012). DOI: 10.1520/F1142-98R12.10.1520/F1142-19.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’sstandard’s Document Summary page on the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
F1142 − 19
2.2 ANSIASME Standards:
B1.1 Unified Inch Screw ThreadsThreads, UN and UNR Thread Form
Y14.5MY14.5 Dimensioning and Tolerancing
B18.2.1 Square and Hex Bolts and Screws, Inch SeriesSquare, Hex, Heavy Hex, and Askew Head Bolts and Hex, Heavy Hex,
Hex Flange, Lobed Head, and Lag Screws (Inch Series)
2.3 American Bureau of Shipping ABS Standard:
Rules for Building and Classing Steel Vessels
2.4 Steel Structures Painting Council NACE Standard:
SP-10NACE No. 2/SSPC-SP 10 Surface Preparation Specification No. 10Near-White Metal Blast Cleaning
2.5 Code of Federal Regulations Standard:
CFR 46 Code of Federal Regulations
3. Terminology
3.1 Definitions:
3.1.1 manhole—manhole, n—an accessway located in a tank structure.
3.1.2 semi-flush—semi-flush, n—placement of the cover over the ringed opening (without coaming).
4. Classification
4.1 Type I—15- by 23-in. (381- by 584-mm) size of access opening. Type II—18- by 24-in. (457- by 610-mm) size of access
opening.
1 3 1
4.2 Grade 1— ⁄4-in. (6.35-mm) thick cover plate. Grade 2— ⁄8-in. (9.5-mm) thick cover plate. Grade 3— ⁄2-in. (12.7-mm) thick
cover plate.
4.3 Class A Manhole Cover Assemblies—Class A manhole cover assemblies shall be abrasive blasted to near white near-white
metal in accordance with SSPC SP-10, NACE No. 2/SSPC-SP 10, and a commercial marine quality, nonhazardous,
corrosion-inhibiting, and oil-resistant primer coating be applied for protection for a period of one year during shipping and in
shipyard handling.
4.4 Class B Manhole Cover Assemblies—Class B manhole cover assemblies shall be galvanized in accordance with
Specification A153/A153M.
5. Ordering Information
5.1 The purchasers ordering information shall include the following:
5.1.1 ASTM designation and year of issue,
5.1.2 Type (see 4.1),
5.1.3 Grade (see 4.2),
5.1.4 Class (see 4.3),
5.1.5 Quantity,
5.1.6 Remarks—Handles (are/are not) required,
5.1.7 Approval—Classification Society approval (is/is not) required, and
5.1.8 Gasket, if other than specified (see 6.6).
6. Materials and Manufacture
6.1 Plate for the cover and the ring shall be of Specifications A36/A36M or A131/A131M steel.
6.2 Round bar for the handle shall be in accordance with Specification F783, Type A.
3 3
6.3 Welded studs shall be ⁄4-in. (19.05-mm) 10 UNC-2A by 1 ⁄4 in. (44.4 mm) long and manufactured of ordinary steel to
commercial standards. Threads shall be the coarse thread series as specified in the latest issue of ANSIASME B1.1.
6.4 Washers shall be ANSIASME B18.2.1 Type A, ⁄4-in. (19.05-mm) washer, 2-in. (50.8-mm) by 0.148-in. (3.8-mm) thick
standard flat manufactured of yellow brass, Specification B36/B36M.
Available from American National Standards Institute (ANSI), 25 W. 43rd St., 4th Floor, Society of Mechanical Engineers (ASME), ASME International Headquarters,
Two Park Ave., New York, NY 10036, http://www.ansi.org.10016-5990, http://www.asme.org.
Available from American Bureau of Shipping (ABS), ABS Plaza, 16855 Northchase Dr., Houston, TX 77060, http://www.eagle.org.
Available from Society for Protective Coatings (SSPC), 40 24th St., 6th Floor, Pittsburgh, PA 15222-4656, http://www.sspc.org.NACE International (NACE), 15835 Park
Ten Pl., Houston, TX 77084, http://www.nace.org.
Available from U.S. Government Printing Office, Superintendent of Documents, 732 N. Capitol St., NW, Washington, DC 20401-0001, http://www.access.gpo.gov.
F1142 − 19
6.5 Heavy hex nuts shall be ⁄4-in. (19.05-mm) 10 UNC-2B and manufactured of yellow brass, Specification B36/B36M.
Threads in nuts shall conform to the dimensions for coarse threads with tolerances prescribed in ANSIASME B1.1. The nuts shall
conform to dimensions prescribed in ANSIASME B18.2.1.
6.6 Unless otherwise specified in ordering information, gasket shall be rubber, ⁄16 in. (4.8 mm) thick, 50 6 5 durometer
prescribed per Classification in accordance with Classification System D2000 5BC507 A14 E034. Manhole cover assemblies for
government application, see Annex A2 for type of gasket.
6.7 Welding shall conform to the latest issue of the American Bureau of Shipping rules ABS Rules for Building and Classing
Steel Vessels or other classification society rules as may be applicable.
6.8 Details of bolted manhole cover assembly are shown in Fig. 1.
7. Dimensions
7.1 Dimensions of manhole cover assembly shall be as indicated in Table 1.
1 1 1
7.2 For plating up to and including ⁄4-in. (6.4-mm) thickness, use cover plate of ⁄4-in. (6.4-mm) thickness. Plating over ⁄4 in.
3 3 3
(6.4 mm) up to, and including ⁄8-in. (9.5-mm) thickness, use cover plate of ⁄8-in. (9.5-mm) thickness. Plating over ⁄8-in. (9.5-mm)
thickness, use cover plate of ⁄2-in. (12.7-mm) thickness.
8. Workmanship, Finish, and Appearance
8.1 Items produced under this specification shall be free of splinters, sharp edges, burrs, projections, and weld spatters.
9. Sampling
9.1 For orders for one or two manhole cover assemblies, each manhole cover assembly shall be inspected.
9.2 For orders for three to ten manhole cover assemblies, two manhole cover assemblies shall be selected at random. If any one
of them fails to meet requirements, then all manholes in the order shall
...