SPECIFICATION NO . 00000 -90871-T7

SSME SUBSYSTEM TEST FACILITY

MODIFICATION OF 1,200 GALLON LOX VESSEL V-1181

for

COCA 4 TEST STAND

SANTA SUSANA FIELD LABORATORY , CALIFORNIA

ROCKETDYNEA Division of North American Rockwell Corporation

6633 Canoga Ave ., Canoga Park , California

Facilities Engineering Department

L . SkogdtadManager

Facilities Engineering

J . Monaghanmanager

SSME Subsystem Test

August 11, 1972

VELLUM RLLEA-

A . E. MooreManagerSSME Facilities

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1 .0 SCOPE OF WORK

1.1 The Builder shall furnish all labor , materials , tools and equip-

ment, and perform all operations required to modify , test and

clean the 1, 200 gallon LOX vessel in accordance with this speci-

fication and drawing C0000-90d71-SKI, Rev . 1, dated August 11, 1972 .

1 .2 Utilities are available at the modification location .

2 .0 CODES AND SPECIFICATIONS

2.1 The latest editions of the following codes and specifications,

with their current revisions , shall form a part of this speci-

fication .

2 .1 .1 ASME Boiler and Pressure Vessel Code, Sections VIII and IX .

2 .1 .2 ASTM Standards , Part 1 , " Steel Piping , Tubing and Fittings" .

2 .1 .3 ASTM Standards , Part 3, "Steel Sheet, Strip , Bar, Rod, Wire ;

Metallic Coated Products" .

2 .1 .4 ASTM Standards , Part 5, "Copper and Copper Alloys" .

2 .1 .5 ASTM Standards, Part 4, "Steel-PressureVessel, Forgings,

Railway, Reinforcing, Structural" .

2 .1 .6 American National Standard Institute, Code of Pressure Piping

ANSI B31 .3 .

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2 .1 .7 Occupational Safety & Health Act

2 .1 .8 California Administrative Code , Title 8, Chapter 4, Industry

Safety Code .

2 .1 .9 California Administrative Code , Title 24, State Building

Standards , Part 3 Basic Electrical Regulations , State Build-

ing Standards Electrical Code .

3 .0 DESIGN REQUIREMENT S

3 .1 The shipping saddles shall be removed , and the openings in outer

304L stainless steel shell reparied by welding a 1/4" thick 304

stainless steel patch over openings with a minimum of 1-1/2 lap

all around .

3 .1 .1 At the Builder's option, the saddles may be removed before or

after modifying the vessel . These are to be removed intac t

and stored at the site as designated by the NR Field Representa-

tive .

3 .2 The stainless steel pressurizing nozzle and diffuser shall be

modified , as described on-the drawing .

3.3 T4tr" ne-inch Grayloc connections shall be installed in the

lower stainless steel outlet nozzle .

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3 .4 The vessel shall have all annular space vacuum equipment,

together with instrumentation, located in a weatherproof

cabinet with a full height double door . The vacuum pump

shall be located within the cabinet so as to be readily

removable for servicing .

the vessel .

The cabinet shall be located near

3 .4.1 All gasketed closures and connections shall be provided wit h

two spare gaskets suitably boxed for storage and marked fo r

identification .

3 .5 MATERIALS

3.5 .1 Existing inner vessel : ASTM A182 F304L

3.5.2 Existing outer vessel : ASTM A240 Type 304L

3.5 .3 Nev Grayloc hubs : ASTM A182 F316

3 .5 .4 New Grayloc clamps : ASTM A 3S1 N

3.5 .5 New Grayloc seal rings : 17-4 PH Teflon Coated

3 .5 .6 New Grayloc bolting: ASTM A320 B8

3 .5 .7 New Grayloc nuts : ASTM A194 GR8

3 .5 .3 Internal sleeve : ASTM A240 Type 304 L

3 .5 .9 Vacuum piping: ASTM B88, Type K-Bard Drawn

3 .5 .10 Vacuum fittings: ASTM B124, Alloy 12-Wrought

3 .5 .11Vacuum flanges ASTM B124, Alloy 1 2

3.5.12 Vacuum gaskets ; BUNA N "0" Rings

3 .5 .13 Vacuum tube fittings : ASTM B124, Alloy 12-Wrought

3 .5 .14 Vacuum tubing: ASTM B88, Type "L" Soft Annealed

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4 .0 INSTRUMENTATION AND ELECTRICAL EQUIPMENT

4.1 Gaseous nitrogen at 150 psi will be furnished by North American

to within 100 feet of the control cabinet .

4.2 Initial evacuation of the annular space shall be accomplished

with a separate roughing pump supplied by the Builder .

1+ .3 All vacuum valves are to be mass spectrometer tested in accor-

dance with Paragraph 8 .1 .2 .

4.4 ELECTRICAL EQUIPMENT

4 .4.1 Provide a NEMP. 6 control cabinet modified to permit internal

pressurization to 5 P . S .F . and a dead-weight relief device to

maintain this pressure . Provide normally closed door -operated

switch to control the normally open purge valve . Opening the

control cabinet door shall shut-off the nitrogen gas purge .

4 .4 .2 All conduit shall be rigid , galvanized and enameled or lacquered .

Seal-tite Type UA flexible conduit shall be used at motor junc-

tion box .

4 .4.3 Cabinet penetrations for electrical installations shall be made

only by the use of through -bulkhead type threaded fittings which

use 0-Ring type gaskets . Except as indicated all conduit runs

penetrating the control cabinet shall be provided with conduit

seals filled with compound to prevent gas leakage .

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4 .4 .4 Power conductors shall be THW , No . 12 AWG minimum . Color

coding shall be red , black, blue for phase wires . Conductors

for DC systems shall be stranded , tinned copper conforming to

the requirements of Specification MIL-W- 5086A , Type I, #12 AWG .

4 .4 .5 Laminated plastic nameplates shall be provided for electrical

equipment and instrumentation devices designating function .

Letters shall be 3/16 inch black, engraved .

4 .4 .6 A STOP -START station for the pump motor shall be located out-

side the control cabinet near the front and facing the door .

4 .4.7 The control cabinet shall contain, in addition to the items

mentioned above , the following :

4 .4 .7.1 A magnetic starter for the vacuum pump motor . The starter shall

be provided with 3 overload protectors appropriately sized to the

connected load . The starter coil shall be suitable for 28 VDC

operation . Provision shall be made for opening Item 13 valve

after an adjustable time delay covering the range of .5 second

to 50 seconds measured from the application of power to the motor .

This time delay .shall be accomplished with a relay suitable for

operation at 28 VDC . The relay shall be mounted in an auxiliary

box located so as to permit ready access for adjustment of the

time . No AC wiring shall be installed in this box . Wiring shall

be such that the time delay relay coil cannot be energized unless

interlock control voltage is available from the 120 VAC panel .

The control circuit wiring shall be as indicated in SK.2 .

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DC power for operation of the motor starter coil , the time de-

lay relay , and the pilot valve for Item 13 will be made avail-

able by North American at a source not more than 30 feet from

the control cabinet . Connection shall be by the Builder . The

motor starter shall be located so that the overload reset button

is very readily accessible from the front of the cabinet .

4 .4.7.2 1.5 KVA, 10, 480-120/240V, 60-cycle transformer connected to a

4-circuit breaker (20 amp each), 3-wire panel . Each primary

lead of the transformer shall be fused at 7 .5 amps . The 120 V

panel shall be mounted within 12 inches of the control cabinet door,

preferably 3 feet above the floor . No equipment, other than

the cabinet door, shall be mounted closer than 20 inches from

the front of the 120V panel . One circuit of the panel shall

serve instrumentation, one circuit shall be for lights, one

circuit for interlock control, and one circuit spare .

4 .4 .7 .3 Two incandescent 100 watt vaportight fixtures .

4 .4 .7 .4 Two duplex receptable outlet Arrow Hart 5252 .

4 .4 .8 A circuit breaker shall be provided on the exterior of the con-

trol cabinet . The trip rating of the breaker shall be 30 amperes

and shall serve as a main disconnect for the entire AC electrical

system . Conduit and conductor connections to this breaker shall

be accomplished by the Builder from a 480 VAC, 30, 60-cycle source

approximately 30 feet from vessel .

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5 .0 WELDING

5 .1 All welding and welder qualification procedures shall be per-

formed in accordance with the applicable paragraphs of the

ASME Code, Section VIII and IX for the material being welded .

5 .2 Welds of carbon steel to stainless steel shall be made with

E-309 or E-310 electrodes .

5 .3 Root passes of butt weldson corrosion resistant steel compo-

nents welded from one side only shall be made by inert gas

shielded arc method with helium or argon the shielding gas .

An inert gas back purge shall be maintained during all weld-

ing of the root pass of stainless steel until the weld i s

cool . Subsequent passes may be made by other approved shielded

arc methods .

5 .4 Gas welding will not be permitted .

5.5 All pressure retaining welds shall be full penetration .

6 .0 CLEANING

6.1 The Builder shall perform all cleaning operations indicated .

6 .2 Protect all sealing surfaces during chemical cleaning.

6.3 All cleaning and rinse solutions shall be sprayed, circulated,

or applied in a manner that all surfaces of the system to be

cleaned shall be completely wetted with the solutions . Rinse

water shall not be reused .

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6 .4 Once water solutions have been introduced into the system,

the surfaces to be cleaned shall not be allowed to become

dry between the steps of the procedure until the drying step

has started .

6 .5 All sections of the system to be cleaned that can trap or

retain any liquid shall be drained or emptied between the

application of each different solution or chemical mixture .

During or after the final rinse and prior to the drying

step, each flange connection shall be loosened or opened to

assure the removal of all contamination from between flange

faces .

6 .6 The Builder shall seal all systems following cleanliness

inspections and shall provide blanking hubs, blind flanges

and/or "AN" plugs for all openings .

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6 .7 CHEMICAL CLEANING MATERIALS

6 .7.1 Trichloroethane, 1,1,1, solvent: Stabilized, vapor degreas-

ing and solvent flushing grade .

6 .7 .2 Mild Alkaline Cleaner : Detergent type cleaner such as Turco

No . 4090, as manufactured by Turco Products, Inc ., 6135 South

Central Avenue, Los Angeles , California, or equal .

6.8 CHEMICAL CLEANING PROCESSE S

6 .8.1 Degrease: Flush with a mild alkaline cleaner solution at a

minimum temperature of 140 degrees F or trichloroethane

solvent until all traces of oil and grease are removed .

6 .8.2 Flush : Rinse with distilled or deionized water until effluent

water pH and influent water pH are equivalent .

6 .8.3 Etch: Etch for a period of 5 to 30 minutes with a mixture

of 3% technical grade hydrofluoric acid, 10% technical grade

nitric acid (by weight ) and the remainder deionized or dis-

tilled water .

6 .8.4 Dry: Purge with dry nitrogen until a dew point of minus 50

degrees F is reached or until moisture content of discharged

nitrogen is 30 ppm by volume . Test dew point with a

Consolidated Electrodynamic Corporation Moisture Monitor, Type

26 -303 .

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6 .8 .5 Inspect : Inspect by visual examination . No evidence of

oil, stain, rust, scale, solid particles, or any foreign

material will be accepted .

6 .8.6 Seal: Seal all openings against contamination . Grayloc

hubs shall be sealed with Grayloc blanking hubs . The Builder

shall be responsible for the maintenance of the vessel in the

sealed, cleaned condition until acceptance of the vessel by

North American .

6 .9Authority for determining adequacy of cleanliness of all

work rests with North American .

6 .10 CLEANING SEQUENCE

Inner vessel, inner surface :

6 .10.1 Degrease

6 .10 .2 Flush, if degreased with alkaline cleane r

6 .10 .3 Etch reworked areas only

6 .10 .4 Flush

6.10 .5 Dry

6 .10 .6 Inspect

6 .10 .7 Seal

7 .0 FABRICATION AND INSTALLATION

7.1 GENERAL

7 .1 .1 On alloperations where flame cutting, arc cutting, or

arc-air gouging of stainless steel are used , 1/64 inch of

material below the scarfing marks shall be removed .

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8.0 TESTS

8.1 The following tests shall be performed by the Builder using

laboratory percision type equipment, calibrated to assure

accuracy. All test procedures and results will be witnessed

by and subject to the approval of North- American .

8.1 .1 HYDROSTATIC TEST

8 .1 .1 .1 The inner vessel shall be hydrostatically testedin accord-

ance with Section VIII of the ASME Code . The gaskets

specified shall be used during hydrostatic testing .

8 .1 .1 .2 Test pressure of 9000 lbs . shall be maintained with no

decrease for 30 minutes with pressure source off . Pressure

shall be built up gradually to maximum test pressure with

continual inspection to prevent damage to the system .

8 .1 .2 MASS SPECTROMETER LEAK TEST

8.1 .2 .1 Complete heliummass spectrometer vacuum testing shall be

performed .

8.1 .2.2 A "no-leak" reading shall be obtained on a Consolidated

Elec+.rnHvnamics Corporation Model 120 Mass Spectrometer

Helium Leak Detector set at 10-9 Std . cc/sec . sensitivity.

8 .1 .2 .2 .1 Equipment shall be operated in accordance with manufacturer's

operating it tructions .

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8 .1 .2 .2 . 2 Prior to testing, the Mass Spectrometer shall have been

certified for accuracy at 10-9 Std . cc /sec . and the certif-

ication presented to North American for approval .

8 .1 .2 .3 Builder shall evacuate the annular space down to 10 microns

or less . The evacuating line to the vacuum pump shall be

blanked off with a suitable vacuum valve .

8 .1.2.4 The Builder shall measure the annular space vacuum during

the test with the vacuum gages specified . Testing shall be

suspended if the vacuum exceed 30 microns, and shall not be

resumed until the annular space has again been evacuated

down to 10 microns .

8 .1 .2 .5 After the annular space has been evacuated to 10 microns

and the vacuum pump isolated the outer vessel, complete

with all lines, flanges, and fittings to the point where

these extend through the outer vessel, and all weld seams

shall be sprayed with a fine jet of helium, and tested for

leaks with the Mass Spectrometer .

8.1 .2 .6 Any leaks shall be repaired and the test repeated.

8 .1 .2 .7 Builder shall open and close all vacuum valves during the

test specified in Paragraph 8 .1 .2 .5 to demonstrate that

they operate smoothly and easily . Proper operation of

remotely operated valves shall be demonstrated .

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9.0 INSPECTION

9.1 All butt welded seams of new piping and nozzle attachments

to the first connection beyond the outer vessel , shall be

100' radiographically inspected . The radiographing shall

be performed in accordance with the applicable paragraphs

of the ASME Code, Section VIII .

9 .2 Exposed film density shall be 1 .7 to 3 .7 H and D with optimum

firm density at 2 .5 H and D.

9 .2 .1 The interpretation of radiographic negatives shall be the

responsibility of North American .

9 .3Dye penetrant inspection shall be performed on all stainless

steel welds not radiographically inspected .

9 .4 The Builder shall notify North American in writing 72 hours

in advance of cleanliness inspections .

9 .4 .1 Final acceptance of cleanliness shall be by North American .

9.5 Inspection procedures and fabrication shall be witnessed

by North American and approved as required by authorized

State or Municipal Inspectors , ASME and Insurance Inspectors

and shall be subject to the approval of North American for

final acceptance .

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10 .0 PAINTING

10 .1 The vessel supports and accessories shall be cleaned of rust

scale, slag, weld spatter, oil, grease, pencil markings, and

any other material which might strike through the paint or

interfere with bonding of the paint to the metal . Cleaning

shall be wire brushing, sandblasting, or wiping with tri-

chloroethane .

10 .1 .1 Stainless steel surfaces shall not be painted .

10.2 All exterior surfaces of the vacuum cabinet shall be painte d

as follows :

10.2 .1 First coat : Zinc chromate conforming to Federal Specification

No . TT-P-645-

10 .2 .2 Finish coat : To conform to Federal Specification No . TT-E-489.

10 .2 .3 Color : No . 17875 (white ) per Federal Standard 595 .

10.3 The vessel shall be stenciled "1181" in 3' - 0" high numbers

and LOX in 2' - 6 " high gothic upper case letters . Stenciling

shall be done with black paint , and shall be located on the

vertical center line of the vessel on a side to be designated

by Nr,rth American Field Representative .

10 .4 The Builder shall protect all equipment and material adjacent

to the work area , by suitable drop clothes or other means .

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