ASTM F1138-21

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
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
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
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
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
2.1 ASTM Standards:
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
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.
Reference IMO MSC Circ 1321, IMO MSC Circ 647, and IMO MSC Circ 851 for specific installation requirements and locations.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’sstandard’s Document Summary page on the ASTM website.
The last approved version of this historical standard is referenced on www.astm.org.
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F1138 − 21
FIG. 1 Spray Shield Construction (Typical)
FIG. 2 Installation of Butterfly Valve Shield
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
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 Abrasion Resistance (Rotary Platform Abrader)
D3776 Test Methods for Mass Per Unit Area (Weight) of Fabric
D3786 Test Method for Bursting Strength of Textile Fabrics—Diaphragm Bursting Strength Tester Method
D3951 Practice for Commercial Packaging
F501 Test Method for Aerospace Materials Response to Flame, with Vertical Test Specimen (for Aerospace Vehicles Standard
Conditions) (Withdrawn 1998)
F1138 − 21
FIG. 4 Spray Shield for Simplex Strainer
2.2 American Association of Textile Chemists and Colorists Standards:
AATCC-22 Water Repellency, Spray Test
AATCC-35 Water Resistance, Rain Test
AATCC-127 Water Resistance, Hydrostatic Pressure Test
Available from American Association of Textile Chemists and Colorists (AATCC), P.O. Box 12215, Research Triangle Park, NC 27709,27709-2215, http://
www.aatcc.org.
F1138 − 21
FIG. 5 Spray Shield for Butterfly Valve
FIG. 6 Spray Shield for Valve Bonnet
2.3 Military Standards:
MIL-C-20079 Cloth, Glass, Tape, Textile Glass and Thread, Glass
MIL-C-20696MIL-PRF-20696 Cloth, Coated, Nylon WaterproofWaterproof, Weather Resistant
Available from U.S. Government Printing Office, Superintendent of Documents, 732 N. Capitol St., NW, Mail Stop: SDE, Washington, DC 20401,20401-0001,
http://www.access.gpo.gov.
F1138 − 21
2.4 Federal Standard:
WW-C-440 Clamps, Hose (Low Pressure)
2.5 IMO Standards:
IMO SOLAS 1974 as amended through 2014, Chapter II-2 Regulation 4
IMO MSC Circ 647 Guidelines to Minimize Leakages From Flammable Liquid Systems
IMO MSC Circ 851 Guidelines on Engine Room Oil Fuel Systems
IMO MSC Circ 1321 Guidelines For Measures to Prevent Fires in Engine-Rooms and Cargo Pump-Rooms
3. Ordering Information
3.1 ASTM designation and year of issue,
3.2 Length and width required (see 7.1), and
3.3 Type of stainless steel (see 4.1).
3.4 Type of lacing hardware required (see 4.1.1).
4. Materials and Manufacture
4.1 Lacing Optional lacing hooks, lacing rings, and lacing washers (see Fig. 7) shall be constructed of stainless steel in accordance
with Specifications A176, A276, or A580/A580M.
4.1.1 Lacing rings may be used instead of lacing hooks where practicable or preferable (see 3.3).
4.1.2 Lacing washers for fastening hooks or rings shall be two-hole washers.
4.2 Stitch wire (Piece 5 in Table 1) shall be constructed of stainless steel in accordance with Specification A580/A580M.
FIG. 7 Optional Lacing Hardware
Available from International Maritime Organization (IMO), 4, Albert Embankment, London SE1 7SR, United Kingdom, http://www.imo.org.
F1138 − 21
TABLE 1 List of Material
Piece
Description Quality Material Specification Remarks
Number
1 Hook, lacing as required stainless steel ASTM A176, A276, A580/ see 4.1 (Optional)
302, 304, or 316 A580M
2 Cloth, aluminum foil, glass as required glass/aluminum MIL-C-20079 Type I,
Class 10
3 Thread as required glass MIL-C-20079 Type III,
Class 3 (for machine sewing)
nylon white, Size 5 Z-twist,
three-ply
4 Washer, blank as required stainless steel ASTM A176, A276 ⁄4-in. diameter × 0.030 in.
304 or 316 thick (Optional)
5 Wire, stitch as required stainless steel ASTM A580/A580M see 6.1
301, 304 or 316
6 Label, identification as required see 13
7 Clamp, hose as required Cres 201 WW-C-440 Type F
8 Wire as required brass ASTM B134/B134M 17 or 18 gage
Cr-Ni-alloy ASTM B166 17 or 18 gage
Cu-Ni-alloy ASTM B164 17 or 18 gage
stainless steel ASTM A580/A580M 17 or 18 gage
304 or 316
8 Wire as required brass ASTM B134/B134M 17 or 18 gauge
Cr-Ni-alloy ASTM B166 17 or 18 gauge
Cu-Ni-alloy ASTM B164 17 or 18 gauge
stainless steel ASTM A580/A580M 17 or 18 gauge
304 or 316
9 Rings, lacing as required stainless steel ASTM A276, A580/A580M see 4.1.1 (Optional)
302, 304, or 316
10 Fabric, protective outer as required fiberglass cloth/silicone MIL-PRF-20696 see Table 2
jacket coated fiberglass
4.3 The aluminized glass cloth, thread, and the protective outer jacket shall be constructed of material as specified in Table 1 and
Table 2.
5. Physical and Mechanical Properties
5.1 The physical and mechanical properties for the aluminized glass cloth, thread, and protective outer jacket shall be as specified
in Table 1 and Table 2
...