DEPARTMENT OF DEFENSE STANDARD PRACTICE - San Diego Seal

NOT MEASUREMENT

SENSITIVE

MIL-STD-777F(SH)

30 March 2012

SUPERSEDING

MIL-STD-777E(SH)

7 February 1986

DEPARTMENT OF DEFENSE

STANDARD PRACTICE

SCHEDULE OF PIPING, VALVES, FITTINGS, AND ASSOCIATED

PIPING COMPONENTS FOR NAVAL SURFACE SHIPS

AMSC N/A

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MIL-STD-777F(SH)

FOREWORD

1. This standard is approved for use by the Naval Sea Systems Command and is available for use by all

Departments and Agencies of the Department of Defense.

2. This standard establishes the requirement for piping system components on surface ships, in order to

preclude the necessity for including a piping schedule in each Navy Ship Specification. This standard represents

and includes the latest material requirements previously covered in the Ship Specifications. It is the intent to refer to

this standard in section 505 in the Ship Specifications for all new Navy surface ships and the General Specifications

for Overhaul of Surface Ships (GSO) for existing ships.

3. Comments, suggestions, or questions on this document should be addressed to Commander, Naval Sea

Systems Command, ATTN: SEA 05S, 1333 Isaac Hull Avenue, SE, Stop 5160, Washington Navy Yard DC

20376-5160 or emailed to CommandStandards@navy.mil, with the subject line ¡°Document Comment¡±. Since

contact information can change, you may want to verify the currency of this address information using the ASSIST

Online database at .

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MIL-STD-777F(SH)

CONTENTS

PARAGRAPH

PAGE

1. SCOPE...................................................................................................................................................................... 1

1.1 Scope................................................................................................................................................................. 1

1.2 Category and group designation ....................................................................................................................... 1

1.3 Superseded pages .............................................................................................................................................. 1

2. APPLICABLE DOCUMENTS ................................................................................................................................ 1

2.1 General .............................................................................................................................................................. 1

2.2 Government documents .................................................................................................................................... 1

2.2.1 Specifications, standards, and handbooks ................................................................................................ 1

2.2.2 Other Government documents, drawings, and publications ..................................................................... 5

2.3 Non-Government publications .......................................................................................................................... 7

2.4 Order of precedence ........................................................................................................................................ 11

3. DEFINITIONS ....................................................................................................................................................... 11

4. GENERAL REQUIREMENTS .............................................................................................................................. 11

4.1 Recycled, recovered, or environmentally preferable materials ....................................................................... 11

4.2 Nuclear plant piping ........................................................................................................................................ 11

4.3 Gauge piping ................................................................................................................................................... 12

4.3.1 Root valves ............................................................................................................................................. 12

4.4 Thermometer wells ......................................................................................................................................... 12

4.5 Maximum material temperature ...................................................................................................................... 12

4.6 Fire protection ................................................................................................................................................. 12

4.7 Seawater valves............................................................................................................................................... 12

4.8 Valve approvals .............................................................................................................................................. 12

4.9 Pressure temperature ratings ........................................................................................................................... 12

4.10 Butt-weld requirements ................................................................................................................................. 13

4.11 Long-radius elbows ....................................................................................................................................... 13

4.12 Steel valve seat and disc materials ................................................................................................................ 13

4.13 Threaded joints.............................................................................................................................................. 13

4.14 Fire-hardened fittings .................................................................................................................................... 13

4.14.1 Fire-hardened fitting requirements ....................................................................................................... 13

4.15 Silver-brazed fitting requirements................................................................................................................. 14

4.16 Fasteners ....................................................................................................................................................... 14

4.17 Brass fastener restriction ............................................................................................................................... 16

4.18 Flange finishes .............................................................................................................................................. 16

4.19 Weld joint requirements ................................................................................................................................ 16

4.19.1 Titanium weld restrictions .................................................................................................................... 16

4.20 Flange facings ............................................................................................................................................... 16

4.21 Welded branch outlets................................................................................................................................... 16

4.22 Branch connections ....................................................................................................................................... 17

4.23 Packing requirements .................................................................................................................................... 17

4.24 Bulkhead penetrations ................................................................................................................................... 17

4.24.1 Titanium piping penetrations................................................................................................................ 17

4.24.2 Sleeve requirements ............................................................................................................................. 17

4.25 Union joints................................................................................................................................................... 17

4.26 Gaskets .......................................................................................................................................................... 18

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MIL-STD-777F(SH)

PARAGRAPH

PAGE

4.27 Missile systems ............................................................................................................................................. 19

4.28 Slip-on joints ................................................................................................................................................. 19

4.29 Steam generators ........................................................................................................................................... 19

4.30 Butterfly valves ............................................................................................................................................. 19

4.31 Fuel piping run rules ..................................................................................................................................... 19

4.32 Butt-welded fittings ...................................................................................................................................... 20

4.33 Bessemer steel restriction.............................................................................................................................. 20

4.34 Flexible hose fittings ..................................................................................................................................... 20

4.35 Valve handwheel requirements ..................................................................................................................... 20

4.36 Cast valve material ........................................................................................................................................ 20

4.36.1 Weld repair of copper-nickel castings .................................................................................................. 20

4.37 Flange and fitting construction ..................................................................................................................... 20

4.38 Hydrostatic testing of forgings ...................................................................................................................... 20

4.39 Casting inspections ....................................................................................................................................... 20

4.40 Large ball valves ........................................................................................................................................... 20

4.41 Flaring test .................................................................................................................................................... 20

4.42 Approval of commercial items ...................................................................................................................... 21

4.43 GRP applications .......................................................................................................................................... 21

4.44 Titanium applications.................................................................................................................................... 21

4.44.1 Flange face inserts ................................................................................................................................ 21

4.44.2 Insulating gasket kits ............................................................................................................................ 21

4.44.3 Insulating sleeves and washers ............................................................................................................. 21

4.44.4 Isolation testing .................................................................................................................................... 21

4.44.5 Material requirements .......................................................................................................................... 21

4.44.6 Non destructive testing of grade 2 titanium material for class P-2 piping............................................ 23

4.45 Marking ......................................................................................................................................................... 23

4.46 Mechanically attached fittings (MAFs) ........................................................................................................ 23

4.47 Belled-end fittings and slip-on couplings ..................................................................................................... 23

4.48 Commercial item requirements ..................................................................................................................... 23

4.48.1 Commercial plumbing material ............................................................................................................ 24

4.49 Relief valves ................................................................................................................................................. 24

4.49.1 MIL-V-20065 relief valves .................................................................................................................. 24

4.49.2 MIL-V-24332 relief valves .................................................................................................................. 24

4.50 Stainless steel piping ..................................................................................................................................... 24

4.51 Valve actuators .............................................................................................................................................. 24

5. DETAILED REQUIREMENTS ............................................................................................................................. 24

5.1 Service categories and groups ......................................................................................................................... 24

5.2 Using the tables ............................................................................................................................................... 24

5.3 Category and group listing .............................................................................................................................. 24

6. NOTES ................................................................................................................................................................. 144

6.1 Intended use .................................................................................................................................................. 144

6.2 Acquisition requirements .............................................................................................................................. 144

6.3 Subject term (key word) listing ..................................................................................................................... 144

6.4 Changes from previous issue ........................................................................................................................ 144

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MIL-STD-777F(SH)

LIST OF TABLES

TITLE

PAGE

I. Fire-hardened fitting requirements (for systems in high fire hazard spaces) ........................................................... 14

II. Fire-hardened fitting requirements ......................................................................................................................... 14

III. Gasket materials and ratings ................................................................................................................................. 18

IV. Gasket dimensions ................................................................................................................................................ 18

V. Category A-1, Steam and steam drains, 1500 psig/1000 ¡ãF .................................................................................. 27

VI. Category A-2, Steam and steam drains, 1500 psig/775 ¡ãF ................................................................................... 28

VII. Category A-3, Propulsion plant saturated steam and steam drains, 600 to 1500 psig/775 ¡ãF ............................. 29

VIII. Category A-4 and A-7, Steam and steam drains, 600 psig/875 ¡ãF..................................................................... 31

IX. Category A-5, Steam and steam drains, 600 psig/775 ¡ãF ..................................................................................... 33

X. Category A-6, Steam and steam drains, 150 psig/775 ¡ãF ...................................................................................... 35

XI. Category A-8, Steam and steam drains for auxiliary boiler, reboiler, and waste heat boiler installation

only, 150 psig/366 ¡ãF (sat) .......................................................................................................................................... 37

XII. Category A-9, Steam system overboard discharge, steam generator blowdown, 1500/600 psig/650 ¡ãF ............ 39

XIII. Category A-10, High pressure steam drains between low point trap, drain strainer orifice/orifice plate

assembly discharge stop-check valve and DFT or gland exhaust piping from turbines, discharge main, 100

psig/425 ¡ãF .................................................................................................................................................................. 41

XIV. Category B-1, Feed systems, 600 psig, 400 ¡ãF; 1200 psig, 475 ¡ãF.................................................................... 43

XV. Category B-2, Propulsion plant saturated feed system, 600 to 2050 psig/300 ¡ãF ............................................... 45

XVI. Category C-1 and C-2, Freshwater, including feed, chilled water, condensate, electronic freshwater

cooling, potable, freshwater firefighting, and gas turbine washdown, 200 psig/250 ¡ãF .............................................. 47

XVII. Category C-2, Freshwater, feed water and condensate, including potable, gas turbine washdown, 100

psig/250 ¡ãF .................................................................................................................................................................. 50

XVIII. Category C-3, Glass-reinforced plastic (GRP), 200 psig/150 ¡ãF .................................................................... 53

XIX. Category C-4, Water mist fire fighting, 1500 psig/140 ¡ãF ................................................................................ 54

XX. Category C-5, High purity water, 150 psig/140 ¡ãF ............................................................................................. 56

XXI. Category D-1 and D-3, Seawater, including firemain, main and secondary drainage, ballast, 250

psig/150 ¡ãF .................................................................................................................................................................. 57

XXII. Category D-2, Seawater missile injection system between freshwater accumulating tank and nozzles,

main and secondary drainage, ballast and oily waste transfer, 400 psig/150 ¡ãF .......................................................... 60

XXIII. Category D-4, Seawater, firemain, sodium hypochlorite disinfection treatment ............................................ 62

XXIV. Category E-2, E-3 and U-1, Fuel service, transfer, and stripping, 600 psig ................................................... 66

XXV. Category E-4 and U-1, Fuel service, transfer, and stripping, 200 psig............................................................. 68

XXVI. Category F-1, Lubricating oil, 150 psig/250 ¡ãF .............................................................................................. 70

XXVII. Category G-1, G-3, G-4, and G-5, Hydraulic service, 3000 psig, 180 ¡ãF ..................................................... 73

XXVIII. Category G-2, G-6, and G-7, Low pressure hydraulic (including lines), 400 psig/180 ¡ãF ........................... 77

XXIX. Category G-8, Hydraulic service, 6000 psig/200 ¡ãF ....................................................................................... 80

XXX. Category H-1, Gasoline, 150 psig/150 ¡ãF ........................................................................................................ 81

XXXI. Category H-2, Cleaning fluid and contaminated aviation lubricating system, 100 psig/150 ¡ãF ..................... 83

XXXII. Category I-1, JP-5 fuel service, filling transfer, tank stripping, and auxiliary JP-5, 200 psig/100 ¡ãF ........... 85

XXXIII. Category J-1 and J-2, Air, nitrogen and helium, 6000 psig/150 ¡ãF .............................................................. 87

XXXIV. Category J-3, Air and nitrogen, 600 psig/150 ¡ãF ......................................................................................... 89

XXXV. Category J-4, Air and nitrogen, 200 psig/150 ¡ãF........................................................................................... 91

XXXVI. Category J-5, Air, and bleed-off, 150 psig/550 ¡ãF ....................................................................................... 94

XXXVII. Category J-6, Air, gas turbine starting and prairie masker, 150 psig/450 ¡ãF .............................................. 95

XXXVIII. Category J-7, Air, prairie-masker, gas turbine starting, 100 psig/600 ¡ãF .................................................. 96

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