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DESIGN CONDITIONS
<br />A. This CNG fueling station has been designed with the following
<br />pressure and temperature parameters:
<br />Operating Pressure: 3600 prig
<br />Design Pressure: 4500 psig
<br />Design Temperature: 20 to 110 degrees F
<br />Pneumatic Test Pressure: 4950 psig (for CNG piping)
<br />Materials: All Piping and tubing shall be seamless
<br />PIPE SPECIFICATIONS
<br />A. Natural Gas (G) Abovegrade
<br />1. Carbon Steel (CS): ASTM 106 Grade B Schedule 40 black.
<br />a, Fittings; ASTM A234/A234M .
<br />b. Joints: ASME B31.9.
<br />c. Jacket: None
<br />d. Plug Valves: Refer to PG&E standards.
<br />i. 2 inches and smaller. MSS SP 78, 200psi WOG, threaded ends,
<br />semi -steel construction, and full pipe area.
<br />ii. 2-1/2" and larger: MSS SP 78, 200psi WOG, Flanged ends,
<br />semi -steel construction, full pipe area. Furnish with worth gear
<br />operator.
<br />e. Check valves: Tom Wheatley figure 55 or KF valve series 35 per
<br />PG&E STD K-15,
<br />B. Natural Gas (G) buried
<br />NOT USED
<br />C. Compressed Natural Gas (CNG)
<br />1. Carbon Steel - Heavy Walled (CS2) Schedule 160 ASTM At 06 grade B.
<br />a. Fittings: 6000psi forged steel socket weld - ASME SA 105 (if
<br />buried), ASME SA 350LF2 (if above ground)
<br />2. Tubing (SST) - Seamless, fully annealed tube for general service
<br />conforming to the requirements of ASTM A 213 for Grades TP 304 or
<br />TP 316 material having a minimum ultimate tensile strength of 75,000
<br />psi. Tutting shall be cold finished and free of scratches. All tubing is
<br />sized according to the maximum expected flow rate and must be
<br />installed per the drawings. No tubing with other than the minimum wall
<br />thickness required is to be used without approval of the owner. The
<br />internal and external surfaces of the tubing shall be provided with
<br />adequate protection from corrosion and abrasion during normal
<br />handling and storage. The manufacturer of vendor shall be prepared to
<br />certify that all tubing conforms to the requirements of this specification
<br />and shall provide formal Mill Certificates for each lot.
<br />Above ground tubing shall be of rigid straight lengths. All bends above
<br />grade must be made with tubing benders and should be 90 degrees
<br />whenever possible. All lengths of tubing shall be anchored per code to
<br />prevent excessive vibration. All tubing shall run true to the vertical and
<br />horizontal axis of the equipment and shall be anchored to prevent injury.
<br />All underground tubing shall be continuous with no intermediate joints
<br />fittings or unions that are inaccessible and shall be installed inside a
<br />buried plastic pipe or PVC conduit sleeve. Underground tubing shall be
<br />continuous with no intermediate joints, valves or fittings that are buried
<br />or inaccessible.
<br />Minimum Tube Wall Thickness (Inches):
<br />See Schedule
<br />Tube Fittings:
<br />1/4" TO 1/2" Swagelok or equal 316 stainless steel, double ferrule
<br />type fittings. 5000 psi minimum working pressure.
<br />3/4" Not Used
<br />Ball Valves:
<br />1/4 to 1/2 Hoke series 71, 316 ss w/TFE seats & seals
<br />Needle Valves:
<br />1/4 to 1/2 Hoke, 316 ss w/TFE seals
<br />Sleeve (for buried tubing): Not Used
<br />Bleed Valves: Hoke series 6600, 316 ss bleed valve with integral tube
<br />ends. 6000 psi maximum working pressure.
<br />Bads Pressure Regulators:
<br />Aqua Environmental
<br />TESTING AND INSPECTION
<br />A. When assembly of a welded gas piping or tubing assembly is
<br />complete, a pneumatic pressure test shall be performed in accordance
<br />with ASME/ANSI 1331.3. All pressure sensitive devices (regulators,
<br />relief valves, etc.) Shall be removed or isolated from the system prior to
<br />testing. The leak test pressure shall be as follows:
<br />EiN Pressure
<br />CNG Piping and Tubing (CNG) 4800 psig
<br />Natural Gas Piping (G) 75 psig
<br />Vent piping (V) N/A
<br />1. A source of high-pressure gas (nitrogen) shall be connected to one
<br />end of the system.
<br />2. The pressure shall be gradually increased, in 500 psig increments
<br />and held for 15 minutes (at which time all connections shall be soap
<br />tested to check for leaks), until maximum pressure is reached.
<br />Document testing.
<br />3. After all connections are proved to be leak free, record final pressure
<br />and allow to set for one hour. After one hour, compare test pressure to
<br />recorded pressure. If pressures are the same, bleed off the gas in a
<br />controlled and safe manner. If the test pressure is lower than the
<br />recorded pressure, or if a leak is found while soap testing, find and
<br />repair the leak and repeat the test procedure.
<br />4. Upon completion of the pneumatic pressure test, all pressure
<br />sensitive devices shall be reinstalled in the system and soap tested for
<br />leaks at operating pressure.
<br />S. Contractor shall use an approved soap and water solution to test all
<br />pipe fittings and connections during testing and at start-up.
<br />PURGING AND PRESSURIZING
<br />A. All purging and pressurizing shall be done by Contractor and
<br />observed by the Owner or designated representative.
<br />B. Prior to pressurizing the system with natural gas, the ESD system
<br />must be operational. Natural gas shall not be introduced into the
<br />system without prior authorization from the Owner. All air shall be
<br />purged from the entire system to the satisfaction of the Owner and in
<br />accordance with the manufacturers instructions prior to pressurizing the
<br />system.
<br />C. Prior to Natural gas being introduced into any piping system, all
<br />fabrication, testing, and work requiring flame or sparking devices shall
<br />be complete. After natural gas has been introduced, the Owner shall
<br />do welding or other work, which could ignite natural gas vapors, only
<br />upon authorization.
<br />D. Once the system is pressurized (to full operating pressure) all
<br />valves, welds, joints and fittings shall be leak tested and signed off by
<br />the Owner.
<br />ARNIN
<br />u
<br />" MACHINE
<br />STARTS
<br />AUTOMATICALLY
<br />SIGN TYPE 1141'
<br />SCALE: 3"=1'-0"
<br />SIGN SCHEDULE
<br />TYPE
<br />DESCRIPTION
<br />QTY.
<br />SIZE
<br />MATERIAL
<br />BACKGROUND
<br />TEXT
<br />LOCATION
<br />(NOTE 7)
<br />OWARNING
<br />- FLAMMABLE GAS
<br />6
<br />10"1
<br />0.04 ALUMINUM
<br />ORANGE/WHITE
<br />BLACK
<br />COMPRESSOR AND FUELING AREA (SEE P-2 FOR LOCATION)
<br />OIN
<br />CASE OF FIRE
<br />6
<br />10714"
<br />.04 ALUMINUM
<br />WHITE
<br />BLACK
<br />COMPRESSOR AND FUELING AREA (SEE P-2 FOR LOCATION)
<br />OEMERGENCY
<br />FUEL SHUT-OFF
<br />6
<br />7"X10"
<br />0.04 ALUMINUM
<br />WHITE
<br />RED
<br />ABOVE ESD (E) SWITCH (REFER TO P-2)
<br />®
<br />MACHINE STARTS AUTOMATICALLY
<br />1
<br />7710"
<br />0.04 ALUMINUM
<br />ORANGE
<br />BLACK
<br />COMPRESSOR AREA
<br />OHAZARD
<br />DIAMOND (NPFA 704)
<br />4
<br />10"1
<br />0.125 FRP
<br />HAZ DIAMOND
<br />BLACK
<br />LOCATE NEAR ENTRANCE(S) FASTEN WITH SCREWS OR TIES
<br />SIGNAGE NOTES:
<br />1. ALL SIGNS SHALL BE IN ACCORDANCE WITH OSHA SPECIFICATIONS 1910.145 AND ANSI SPECIFICATIONS Z535.
<br />2. ITABLE FOR OUTDOOR USE.
<br />3. SIGNS SHALL BE MADE OF 0.40 INCH THICK ALUMINUM WITH BAKED WHITE ENAMEL BACKGROUND U.N.O.. LETTERS SHALL BE 3M WEATHERIZED VINYL - SIZE, COLOR AND FONT
<br />AS NOTED.
<br />4. VENDORS LISTED ARE ONLY FOR ESTABLISHING STANDARDS OF QUALITY AND PERFORMANCE. OTHER MANUFACTURES MAY BE SUBSTITUTED IF APPROVED.
<br />5. CONTRACTOR SHALL PROVIDE AND INSTALL SIGNAGE AS SHOWN ON DRAWINGS. IN ADDITION, CONTRACTOR SHALL TAG ALL EQUIPMENT AND VALVES AND SHALL LABEL
<br />ALL LINES IN ACCORDANCE WITH ANSI A13.1-1987.
<br />6. SIGNS SHALL BE PROVIDED AND INSTALLED WITH NECESSARY BRACKETS, SUPPORTS AND HARDWARE. BRACKETS, SUPPORTS AND HARDWARE SHALL BE GALVANIZED.
<br />ALL HARDWARE SHALL BE VANDAL AND TAMPER RESISTANT.
<br />7. WHERE SIGNAGE IS TO BE ATTACHED TO EXTERIOR SURFACE OF EQUIPMENT, SUCH AS COMPRESSOR ENCLOSURE OR DISPENSER FRONT PANEL, SIGN MATERIAL SHALL BE
<br />SELF ADHESIVE VINYL.
<br />8. SIGNS SHALL BE LOCATED FOR EASY VISIBILITY FROM ALL SIDES.
<br />SIGN TYPE 11111 It
<br />SCALE: 3"=1'-0"
<br />SIGN TYPE 1121'
<br />SCALE: 3"=1'-0"
<br />SIGN TYPE 1131'
<br />SCALE:3"=1'-0"
<br />SIGN TYPE 1151'
<br />SCALE: 3"=1'-0"
<br />COUNTY OF SAN JOAQUIN
<br />Submitted 2008
<br />THOMAS RYAN FLINN
<br />DIRECTOR OF PUBLIC WORKS
<br />L3, MINOR REVISION TM 04/08
<br />0 PRELIMINARY FOR CLIENT REVIEW TM
<br />REV. .DESCRIPTION BY DATE
<br />SAN JOAQUIN COUNTY e PUBLIC WORKS
<br />STOCKTON, CA
<br />T.IITCHELLENGINEERSOAKLAND CALIFORNIA
<br />AS NOTED IFOR
<br />DRWN TM
<br />THE USE OF THESE DRAWINGS AND CHECKED TM
<br />SPECIFICATIONS SHALL BE RESTRICTED TO
<br />THE ORIGINAL USE FOR WHICH THEY WERE APPROVED
<br />PREPARED. REUSE, REPRODUCTION, OR
<br />PUBLICATION, IN WHOLE OR IN PART, IS
<br />HPOHIBITED WITHOUT THE WRITTEN CONSENT JOB
<br />OF T. MITCHELL ENGINEERS. 0521
<br />CNG SYSTEM UPGRADE
<br />DOWNTOWN GARAGE
<br />SIGNAGE AND NOTES
<br />P3
<br />an t,: ing :' ra D:Twie 'Sh' �''
<br />Verity
<br />All rtt'o.mat�gn R. `,,Tpr_•c•. rhe S
<br />rPs W.rk
<br />COUNTY OF SAN JOAQUIN
<br />Submitted 2008
<br />THOMAS RYAN FLINN
<br />DIRECTOR OF PUBLIC WORKS
<br />L3, MINOR REVISION TM 04/08
<br />0 PRELIMINARY FOR CLIENT REVIEW TM
<br />REV. .DESCRIPTION BY DATE
<br />SAN JOAQUIN COUNTY e PUBLIC WORKS
<br />STOCKTON, CA
<br />T.IITCHELLENGINEERSOAKLAND CALIFORNIA
<br />AS NOTED IFOR
<br />DRWN TM
<br />THE USE OF THESE DRAWINGS AND CHECKED TM
<br />SPECIFICATIONS SHALL BE RESTRICTED TO
<br />THE ORIGINAL USE FOR WHICH THEY WERE APPROVED
<br />PREPARED. REUSE, REPRODUCTION, OR
<br />PUBLICATION, IN WHOLE OR IN PART, IS
<br />HPOHIBITED WITHOUT THE WRITTEN CONSENT JOB
<br />OF T. MITCHELL ENGINEERS. 0521
<br />CNG SYSTEM UPGRADE
<br />DOWNTOWN GARAGE
<br />SIGNAGE AND NOTES
<br />P3
<br />
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