ASTM F1138-21

Standard Specification for Spray Shields for Mechanical Joints

ABSTRACT
This specification describes the manufacturing requirements for spray shield stock and the fabrication and installation requirements for spray shields made from that stock. The physical and mechanical properties for the aluminized glass cloth, thread, and protective outer jacket shall be as specified. If lacing hooks or rings are of the type that fastens by stitching, the hooks or rings shall be attached to the backup washers using a wire stitch machine and wire. The methods for testing the aluminized glass cloth, thread, and protective outer jacket shall be as specified.
SCOPE
1.1 This specification describes the manufacturing requirements for spray shield stock and the fabrication and installation requirements for spray shields made from that stock.  
1.1.1 Sections 2 – 14 address the manufacturing requirements for the spray shield stock. Annex A1 addresses the fabrication and installation requirements for the spray shields.  
1.1.2 Fig. 1 shows the typical construction of a spray shield. Figs. 2-6 show methods of installation of a spray shield on various mechanical joints.
FIG. 1 Spray Shield Construction (Typical)  
FIG. 2 Installation of Butterfly Valve Shield  
FIG. 3 Spray Shield for Pump Inlet Head  
FIG. 4 Spray Shield for Simplex Strainer  
FIG. 5 Spray Shield for Butterfly Valve  
FIG. 6 Spray Shield for Valve Bonnet  
1.2 The shields are intended for use around mechanical joints (flanged, bolted unions, and so forth) in liquid piping systems with an internal pressure exceeding 26.1 psi (0.18 N/mm2) to prevent the impingement of flammable liquid on hot surfaces or fluids onto electrical switchboards and components resulting from a leak in the mechanical joint, unless otherwise invoked by contractual requirements. Spray Shields are excluded on all suction lines with a head pressure less than 26.1 psi (0.18 N/mm2) and mechanical joints in non-flammable liquid systems in excess of 10 ft of an electrical switchboard, unless otherwise invoked by contractual requirements.2  
1.3 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.  
1.4 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.

General Information

• Status: Published
• Publication Date: 31-Aug-2021
• ICS: 47.020.05 - Materials and components for shipbuilding
• Technical Committee: F25 - Ships and Marine Technology
• Drafting Committee: F25.07 - General Requirements

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:F1138 −21 An American National Standard
Standard Specification for
1
Spray Shields for Mechanical Joints
This standard is issued under the fixed designation F1138; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope mendations issued by the World Trade Organization Technical
Barriers to Trade (TBT) Committee.
1.1 This specification describes the manufacturing require-
mentsforsprayshieldstockandthefabricationandinstallation
2. Referenced Documents
requirements for spray shields made from that stock.
3
2.1 ASTM Standards:
1.1.1 Sections2–14 address the manufacturing require-
A176Specification for Stainless and Heat-Resisting Chro-
ments for the spray shield stock. Annex A1 addresses the
4
mium Steel Plate, Sheet, and Strip (Withdrawn 2015)
fabrication and installation requirements for the spray shields.
A276Specification for Stainless Steel Bars and Shapes
1.1.2 Fig.1showsthetypicalconstructionofasprayshield.
A580/A580MSpecification for Stainless Steel Wire
Figs. 2-6 show methods of installation of a spray shield on
B134/B134MSpecification for Brass Wire
various mechanical joints.
B164Specification for Nickel-Copper Alloy Rod, Bar, and
1.2 The shields are intended for use around mechanical
Wire
joints (flanged, bolted unions, and so forth) in liquid piping
B166Specification for Nickel-Chromium-Aluminum Alloy,
systems with an internal pressure exceeding 26.1 psi (0.18
Nickel-Chromium-IronAlloys,Nickel-Chromium-Cobalt-
2
N/mm )topreventtheimpingementofflammableliquidonhot
Molybdenum Alloy, Nickel-Iron-Chromium-Tungsten
surfaces or fluids onto electrical switchboards and components
Alloy, and Nickel-Chromium-Molybdenum-CopperAlloy
resulting from a leak in the mechanical joint, unless otherwise
Rod, Bar, and Wire
invoked by contractual requirements. Spray Shields are ex-
D1308Test Method for Effect of Household Chemicals on
cluded on all suction lines with a head pressure less than 26.1
Clear and Pigmented Coating Systems
2
psi (0.18 N/mm ) and mechanical joints in non-flammable
D1424Test Method for Tearing Strength of Fabrics by
liquid systems in excess of 10 ft of an electrical switchboard,
Falling-Pendulum (Elmendorf-Type) Apparatus
2
unless otherwise invoked by contractual requirements.
D1682Test Method for Breaking Load and Elongation of
4
1.3 The values stated in inch-pound units are to be regarded
Textile Fabric (Withdrawn 1992)
as standard. The values given in parentheses are mathematical
D1777Test Method for Thickness of Textile Materials
conversions to SI units that are provided for information only
D3389Test Method for Coated FabricsAbrasion Resistance
and are not considered standard.
(Rotary Platform Abrader)
D3776Test Methods for Mass Per Unit Area (Weight) of
1.4 This international standard was developed in accor-
Fabric
dance with internationally recognized principles on standard-
D3786 Test Method for Bursting Strength of Textile
ization established in the Decision on Principles for the
Fabrics—Diaphragm Bursting Strength Tester Method
Development of International Standards, Guides and Recom-
D3951Practice for Commercial Packaging
F501Test Method for Aerospace Materials Response to
1
This specification is under the jurisdiction ofASTM Committee F25 on Ships
and Marine Technology and is the direct responsibility of Subcommittee F25.07 on
3
General Requirements. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved Sept. 1, 2021. Published September 2021. Originally contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
approved in 1988. Last previous edition approved in 2014 as F1138–98 (2014). Standards volume information, refer to the standard’s Document Summary page on
DOI: 10.1520/F1138-21. the ASTM website.
2 4
Reference IMO MSC Circ 1321, IMO MSC Circ 647, and IMO MSC Circ 851 The last approved version of this historical standard is referenced on
for specific installation requirements and locations. www.astm.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
F1138−21
FIG. 1 Spray Shield Construction (Typical)
FIG. 2 Installation of Butterfly Valve Shield
2

---------------------- Page: 2 ----------------------
F1138−21
FIG. 3 Spray Shield for Pump Inle
...

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: F1138 − 98 (Reapproved 2014) F1138 − 21 An American National Standard
Standard Specification for
1
Spray Shields for Mechanical Joints
This standard is issued under the fixed designation F1138; 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.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope
1.1 This specification describes the manufacturing requirements for spray shield stock and the fabrication and installation
requirements for spray shields made from that stock.
1.1.1 Sections 2 – 14 address the manufacturing requirements for the spray shield stock. Annex A1 addresses the fabrication and
installation requirements for the spray shields.
1.1.2 Fig. 1 shows the typical construction of a spray shield. Figs. 2-6 show methods of installation of a spray shield on various
mechanical joints.
1.2 The shields are intended for use around mechanical joints (flanged, bolted unions, and so forth) in liquid piping systems with
2
an internal pressure exceeding 26.1 psi (0.18 N/mm ) to prevent the impingement of flammable liquid on hot surfaces or fluids
onto electrical switchboards and components resulting from a leak in the mechanical joint. joint, unless otherwise invoked by
2
contractual requirements. Spray Shields are excluded on all suction lines with a head pressure less than 26.1 psi (0.18 N/mm ) and
mechanical joints in non-flammable liquid systems in excess of 10 ft of an electrical switchboard, unless otherwise invoked by
2
contractual requirements.
1.3 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information
only.mathematical conversions to SI units that are provided for information only and are not considered standard.
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
3
2.1 ASTM Standards:
4
A176 Specification for Stainless and Heat-Resisting Chromium Steel Plate, Sheet, and Strip (Withdrawn 2015)
A276 Specification for Stainless Steel Bars and Shapes
A580/A580M Specification for Stainless Steel Wire
1
This specification is under the jurisdiction of ASTM Committee F25 on Ships and Marine Technology and is the direct responsibility of Subcommittee F25.07 on General
Requirements.
Current edition approved Feb. 1, 2014Sept. 1, 2021. Published February 2014September 2021. Originally approved in 1988. Last previous edition approved in 20072014
as F1138 – 98 (2007).(2014). DOI: 10.1520/F1138-98R14.10.1520/F1138-21.
2
Reference IMO MSC Circ 1321, IMO MSC Circ 647, and IMO MSC Circ 851 for specific installation requirements and locations.
3
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.
4
The last approved version of this historical standard is referenced on www.astm.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
F1138 − 21
FIG. 1 Spray Shield Construction (Typical)
FIG. 2 Installation of Butterfly Valve Shield
2

---------------------- Page: 2 ----------------------
F1138 − 21
FIG. 3 Spray Shield for Pump Inlet Head
B134/B134M Specification for Brass Wire
B164 Specification for Nickel-Copper Alloy Rod, Bar, and Wire
B166 Specification for Nickel-Chromium-Aluminum Alloy, Nickel-Chromium-Iron Alloys, Nickel-Chromium-Cobalt-
Molybdenum Alloy, Nickel-Iron-Chromium-Tungsten Alloy, and Nickel-Chromium-Molybdenum-Copper Alloy Rod, Bar,
and Wire
D1308 Test Method for Effect of Household Chemicals on Clear and Pigmented Coating Systems
D1424 Test Method for Tearing Strength of Fabrics by Falling-Pendulum (Elmendorf-Type) Apparatus
4
D1682 Test Method for Breaking Load and Elongation of Textile Fabric (Withdrawn 1992)
D1777 Test Method for Thickness of Textile Materials
D3389 Test Method for Coated Fabrics
...