\* \* \* \* \* \* \* \*

READ AND REMOVE THIS PAGE BEFORE PLACING

THE SPECIFICATION SECTION IN THE CONTRACT

\* \* \* \* \* \* \* \*

[DIVISION 15: MECHANICAL]{.underline}

SECTION 15483 ‑ FUEL OIL HANDLING SYSTEM

USE: Completion of the basic mechanical requirements.

**NOTES TO SPECIFIER:**

A. Options within paragraphs are identified by enclosure in brackets;
blank spaces enclosed by brackets \[\_\_\_\_\_\] provide for information
to be inserted, as appropriate, to individual projects.

B. **TO AVOID CONFLICTING REQUIREMENTS AND COSTLY MISTAKES,** the
specifier must edit (delete, substitute or add to the text). The
remaining paragraphs must be renumbered.

C. DELETE FOR FINAL COPY: Notes to the Specifier, located between lines
of asterisks; all \[brackets\], [underlining]{.underline}, **boldface**,
and *italics*, within the paragraphs; and this page. (Open Reveal Codes
\[alt F3\] to do this accurately.)

D. [To Edit "(Footer B)":]{.underline} (Corel 8). **ENTIRE FOOTER SHOULD
BE BOLDED.** Click in the footer and delete the "Project Name (ftr B)"
text and replace it with the **Name of the Project (upper and lower
case)**. Replace date with current MM/YY (WITHOUT BRACKETS).

E. The Guide Specifications are intended to be continuously reviewed and
revised. User's technical comments are appreciated. Also, other related
or similar specification that are written "from scratch" that could
benefit others, or other questions can be sent to NSTC A/E Group, ST
110, or call (303) 987-6868.

**FORMS/DRAWINGS REQUIRED:**

**REQUIRED SPEC MODIFICATIONS:**

[GENERAL NOTES]{.underline}

A. Whenever entire articles, paragraphs or subparagraphs are not
applicable, the articles, paragraphs or subparagraphs should be deleted;
if necessary, reletter or renumber articles, paragraphs or
subparagraphs.

B. THIS GUIDE IS NOT INTENDED AS A SUBSTITUTE FOR READING THE ENTIRE
SECTION.

[TECHNICAL NOTES]{.underline}

A. 1.1B: Select or add applicable specification sections. Do not list
specification sections from Division 15.

B. 4.1 and 4.2: When a \"lump sum\" Contract is used, delete the title
PART 4: MEASUREMENT AND PAYMENT, and both articles from this section.
Measurement and payment will be addressed in Part 4 of \[Section 01009\]
\[or\] \[Section 01010\].

C. 4.1A: When not a \"lump sum\" Contract, select applicable phrases;
use the \"no measurement\" phrase when none of the Pay Items in this
section are included in the Bid Schedule.

D. 4.2A: When not a \"lump sum\" Contract, select applicable phrases;
use the \"no direct payment\" phrase when none of the Pay Items in this
section are included in the Bid Schedule.

E. When Government-furnished property is specified for Pay Items, the
letter suffix GF will be added after the parenthesis of the item number.

**REVISIONS OF THIS SECTION:**

CSI format, editorial changes: 12/01

Metric:

Technical Update: 05/86

SECTION 15483

MECHANICAL FUEL OIL HANDLING SYSTEM

[PART 1: GENERAL]{.underline}

1.1 SUMMARY:

A. Section Includes: The work of this section consists of furnishing and
installing an oil storage tank, controls, and required piping and
accessories. This task completion must result in a complete operable and
safe system of fuel supply to fuel oil burning equipment.

1.2 REFERENCES:

A. American National Standards Institute

ANSI B16.3‑77 Malleable Iron Threaded Fittings, Class 150 and 300

ANSI B16.5‑77 Steel Pipe Flanges and Flanged Fittings Including Ratings
for Class 150, 300, 400, 600, 900, 1500 and 2500

ANSI B16.9‑78 Factory‑Made Wrought Steel Buttwelding Fittings

ANSI B16.11‑80 Forged Steel Fittings, Socket‑Welding and Threaded

ANSI B16.22‑80 Wrought Copper and Bronze Solder‑Joint Pressure Fittings

ANSI B16.24‑79 Bronze Pipe Flanges and Flanged Fittings, Class 150 and
300

ANSI B16.39‑77 Malleable Iron Threaded Pipe Unions Class 150, 250, 300

ANSI B31.1‑80 Power Piping

ANSI B31.3‑80 Chemical Plant and Petroleum Refinery Piping

ANSI B31.4‑79 Liquid Petroleum Transportation Piping Systems

B. American Petroleum Institute

API 650‑80 Welded Steel Tanks for Oil Storage

C. American Society of Mechanical Engineers

ASME Boiler and Pressure Code: Section VIII ‑ Pressure Vessels ‑ 1977

Section IX ‑ Welding Qualifications ‑ 1978

D. American Society for Testing and Materials

ASTM A 53‑80 Pipe, Steel, Black and Hot‑Dipped, Zinc‑Coated Welded and
Seamless

ASTM A 120‑80 Pipe, Steel, Black and Hot‑Dipped Zinc‑Coated (Galvanized)
Welded and Seamless, for Ordinary Use

ASTM B 88‑80 Seamless Copper Water Tube

E. American Welding Society

AWS A5.8‑76 Brazing Filler Metal

F. Federal Specifications

FS GG‑T‑321D Thermometers, Self‑Indicating, Liquid in Glass, for & Am 2
Machinery and Piping Systems

FS UU‑B‑790A Building Paper, Vegetable Fiber, (Kraft, Waterproofed,& Int
Am 1Water Repellant and Fire Resistant)

FS WW‑V‑54D Valve, Gate, Bronze (125, 150, and 200 Pound, Screwed & Int
Am 3 Flanged, Solder end, for Land Use)

FS WW‑P‑521G Pipe Fittings, Flange Fittings, and Flanges, Steel and
Malleable Iron, (Threaded and Butt Welded), 150 Pound

G. Manufacturer\'s Standard Society of the Valves and Fittings Industry
(MSS) Publications:

MSS SP‑58‑75 Pipe Hangers and Supports ‑ Materials and Design

MSS SP‑69‑76 Pipe Hangers and Supports ‑ Selection and Application

H. Military Specifications

MIL‑T‑462D Tank, Liquid Storage, Metal, Fuel‑oil, Horizontal

MIL‑A‑907D Antiseize Compound, High Temperature (Navy)

MIL‑T‑5544B Thread Compound, Antiseize, Graphite‑Petrolatum

& Am 1

MIL‑P‑15147C Primer and Enamel, Coal Tar

MIL‑S‑16293G Strainer, Sediment, Pipeline, Water, Air, Gas, Oil, or
Steam

MIL‑P‑17608B Pump, Rotary, Power Driven, Viscous Liquid

MIL‑G‑17713B(YD) Gage, Liquid Level Measuring, Tank

MIL‑M‑18294B(YD) Meter, Fluid Quantity Volumetric

MIL‑V‑18434B Valves, Gate, Globe, and Angle, Steel

MIL‑V‑18436D Valves, Check: Bronze, Cast‑Iron and Steel Body & Int AM 1

MIL‑V‑19902B Cap, Vent, Fuel Storage Tank

MIL‑T‑22361 Thread Compound, Antiseize, Zinc Dust‑Petrolatum & Am 1

MIL‑P‑23236 Paint Coating Systems, Steel Ship Tank Fuel and & Am 5 Salt
Water Ballast

MIL‑C‑24176A Cement, Epoxy, Metal Repair and Hull Smoothing

MIL‑T‑52777A Tanks, Storage, Underground, Glass Fiber Reinforced Plastic

I. National Fire Protection Association

NFPA 30‑81 Flammable and Combustible Liquids Code

NFPA 31‑78 Installation of Oil Burning Equipment

J. Steel Structures Painting Council

SSPC‑Paint 9‑64 No. 9 White (or Colored) Vinyl Paint

SSPC‑PS10.01‑64T Coal Tar Coating Systems No. 10.01 Hot‑Applied coal Tar
Enamel

K. Steel Tank Institute

STI‑P3 111 E. Wacker Drive Chicago, IL 60601

L. Underwriters\' Laboratories, Inc.

UL‑58‑76 Steel Underground Tanks for Flammable and Combustible Liquids

UL‑142‑78 Standards for Steel Aboveground Tanks for Flammable and
Combustible Liquids

UL‑842‑80 Valves for Flammable Fluids

1.3 SUBMITTALS:

A. Shop Drawings: Contractor shall submit [ ]{.underline} copies of shop
drawings for each tank. Drawings shall include critical dimensions and
show locations of fittings and accessories, i.e., manways, ladders,
hold‑down straps, heating coils, etc. Materials of construction shall be
in accordance with Part 2 of this specification.

B. Catalog Data: Contractor shall submit [ ]{.underline} copies of
manufacturer\'s literature.

C. Certification Plate: UL labels shall be affixed to each tank.

D. Installation Instructions: Contractor shall submit [ ]{.underline}
copies of manufacturer\'s latest installation instructions.

E. Calibration Charts: Contractor shall submit [ ]{.underline} copies of
manufacturer\'s calibration charts.

[PART 2: PRODUCTS]{.underline}

2.1 MATERIALS:

A. Steel Piping:

1\. ab Pipe: \[ASTM A 120\] \[or\] \[ASTM A 53\] Schedule \[40\] \[80\],
black steel, \[electric‑resistance welded\] \[or\] \[seamless\].

2\. ab Threaded and Socket‑Welding Fittings: ANSI B16.11 forged steel.

3\. ab Threaded Fittings: ANSI B16.3, black malleable iron.

4\. Butt‑Welding Fittings: ANSI B16.9, \[150 lb\] \[300 lb\]. Backing
rings shall conform to ANSI B31.4 and be compatible with materials being
welded.

5\. Flanges and Flange Fittings: ANSI B16.5 steel flanges or convoluted
steel flanges which meet the criteria of ASME Code Section VIII. Flange
faces shall have integral grooves of rectangular cross section which
afford containment for self‑energizing gasket material.

B. Copper Piping:

1\. ab Pipe and Tubing: ASTM B 88, Type \[K\] \[or\] \[L\],
\[hard‑drawn\] \[annealed\].

2\. ab Flanges and Flanged Fittings: ANSI B16.24, \[150 lb\] \[300 lb\].

3\. Solder Joint Fittings: ANSI B16.22 wrought copper.

C. Vent Piping: Zinc‑coated steel conforming to ASTM A 120 standard
weight, with zinc‑coated malleable iron fittings conforming to Fed.
Sped. WW‑P‑521.

D. Valves:

1\. Bronze Gate Valves: Fed. Spec. WW‑V‑54, Class A, 1 1/2 inches and
smaller, wedge disc, non‑rising stem.

2\. Steel Gate Valves: Mil. Spec. MIL‑V‑18434, Type I, oil service,
Class 150.

3\. Relief Valves: UL 842, steel or bronze bodies, corrosion‑resistant
valve seats, and positive closing so that no leakage will occur.

4\. Check Valves: Mil. Spec. MIL‑V‑18436, Group \[A\] \[[
]{.underline}\], Type \[I\] \[II\] \[III\], \[[ ]{.underline}\], Trim
\[3\] \[[ ]{.underline}\], Class 150 \[[ ]{.underline}\].

E. Piping Accessories:

1\. Flexible Hose: Flexible metal hose, corrugated type with braided
wire sheath covering, close‑pitch annular corrugations, rated for a
working pressure of at least 125 psig, 8‑inch minimum live length,
flanged end connections, UL listed for flammable liquid service. metal
for hose and braided wire sheath shall be stainless steel, any type of
ASTM 300 series.

2\. Unions: ASNI B 16.39, 150 lb and 250 lb.

3\. Welding Filler Metal: ANSI B 31.4 and compatible with the materials
to be welded.

4\. Brazing Filler Metal: AWS A 5.8, silver base alloy, with melting
point not less than 1,100EF.

5\. Hangers and Supports: MSS‑SP‑58, types as required by MSS SP‑69.

6\. Strainers: Mil. Spec. MIL‑S‑16293 single or duplex basket type, as
specified with inlet and outlet on the same center line. Cast steel or
fabricated steel body, \[[ ]{.underline}\] mesh 300 series
stainless‑steel baskets. Open area of one basket shall be 2‑1/2 times
inlet or outlet piping area. Furnish one spare basket.

7\. Fill Box: Lock‑type design with cast‑iron body and bronze inside
lock cap, designed for flush mounting in concrete encasement,
water‑tight with drain holes in bottom. Furnish wrench for opening box.

8\. Gaskets: Provide composition asbestos gaskets for flanged and bolted
connections.

F. Meters: Mil. Spec. MIL‑M‑18294, Type A \[piston\] \[or\] \[disk\],
size as indicated, for \[[ ]{.underline}\] gpm maximum flow of Grade No.
\[[ ]{.underline}\] fuel oil at \[[ ]{.underline}\] to \[[
]{.underline}\] EF and \[[ ]{.underline}\] psig maximum pressure. Meter
shall be arranged for mounting \[in pipe line\] \[on pedestal\] \[and
shall have overrange protection\]. Casing shall be \[aluminum\]
\[bronze\] \[cast‑iron\]. Pressure drop through meter shall not exceed
\[[ ]{.underline}\].

G. Instruments: Tank gauges Mil. Spec. MIL‑G‑17713, buoyant force type
with direct reading dial. Thermometers Fed. Spec. GG‑T‑321 mercury type
with wells and temperature range suitable for the use encountered.

H. Protective Coating Systems for Buried Steel Tanks and Steel Piping:

1\. Steel Tank Coating: Coat the exterior surfaces of steel tanks for
installation underground with a protective coating conforming to SSPC‑PS
10.01 except that only coal tar conforming to Mil. Spec. MIL‑P‑15147
shall be used. The coal tar coating shall be covered with reinforced
protective paper conforming to Fed. Spec. UU‑B‑790, Type 1, Grade !,
Style 4, with reinforcing averaging not less than 20 strands of fiber
per foot and having a minimum tensile strength of 35 pounds per inch in
both directions. Cover surfaces of the tank. Secure paper in place by
cementing it to itself with an approved adhesive and by tying it with
marline at intervals of 2 ft. Wire shall not be used. Contractor shall
submit written certification that the surface preparation, application
procedure and materials for the coating conform to the

specified requirements. Coating may be shop or field applied at the
option of the Contractor.

2\. Epoxy Coal‑Tar Coated Steel Tanks: Protective coating and corrosion
control system shall meet the requirements of STI‑P3.

3\. Fiberglass Reinforced Plastic Coated Steel Tanks: Steel tanks may be
provided with a 1/8‑inch nominal fiberglass reinforced plastic coating.

4\. Piping and Fittings: Protective coatings shall conform to the
requirements of Section ????? ‑ Protection of Buried Steel Piping and
Steel Bulkhead Tie Rods.

5\. Protective Coating Systems: Protective coating systems, including
FRP coated steel tanks, shall be inspected with a 10,000 volt holiday
tester just prior to placement in ground and any holidays revealed shall
be promptly repaired to a condition as good as the rest of the system.

I. Protection for Aboveground Steel Pipe and Steel Tanks: Protect
aboveground steel pipe and tanks against atmospheric corrosion by a
prime coat, inorganic, zinc‑rich primer in accordance with Mil. Spec.
MIL‑P‑23236, Type I, Class 3, bond or tie coat in accordance with
specifications of manufacturer of prime coat and two finish coats of
vinyl paint in accordance with SSPC ‑ Paint 9. Internally coat
aboveground steel storage tanks with capacities in excess of 20,000
gallons in accordance with Section ????? ‑ Coating Systems, Interior
Welded‑Steel Tanks (for Petroleum Fuel Storage). Prior to internal
coating as described above, unsealed lap seams shall be sealed with
epoxy cement in accordance with Mil. Spec. MIL‑C‑24176, Type II.
Inaccessible voids shall be filled with epoxy cement prior to
application of the coating.

2.2 FUEL OIL HEATING AND PUMPING:

A. Storage Tank Heater: Vertical type installed through a \[[
]{.underline}\] diameter manhole in top of tank. Weld pipe connections
to manhole cover and entire assembly shall be removable as a unit.
Heater shall have the capacity to heat \[[ ]{.underline}\] gpm of No.
\[[ ]{.underline}\] fuel oil from \[[ ]{.underline}\] EF to \[[
]{.underline}\] EF when supplied with \[[ ]{.underline} psig steam\] \[[
]{.underline} gpm of [ ]{.underline} EF hot water\]. Coil shall have
steel tubes and be designed for working pressure of \[[ ]{.underline}\]
psig. Coil shall extend to within 6 inches of tank bottom and shall
surround oil suction line.

B. Shell and Tube Heater: The shell, containing oil, shall be steel with
steel or cast iron heads and 3/4‑inch O.D. x 16 BWG steel tubes with
removable bundles. Construct unit in accordance with Section VIII of the
ASME Boiler Pressure Vessel Code and design for \[[ ]{.underline}\]
psig. Heater shall have necessary heating medium connections such as
inlet and outlet, drain, vent, thermometer, and pressure gauge. Heater
shall have the capacity of heating \[[ ]{.underline}\] gpm of No. \[[
]{.underline}\] fuel oil from \[[ ]{.underline}\] EF to \[[
]{.underline}\] EF when supplied with \[[ ]{.underline} psig steam.\]
\[[ ]{.underline} gpm of [ ]{.underline} EF hot water.\]

C. Electric Heater: Heater shall be constructed of steel shell and steel
flanges and designed for \[[ ]{.underline}\] psig. Heater shall have
sufficient capacity to heat \[[ ]{.underline}\] gpm of No. \[[
]{.underline}\] fuel oil from \[[ ]{.underline}\] EF to \[[
]{.underline}\] EF while operation on \[[ ]{.underline}\] volts, \[[
]{.underline}\] phase, \[[ ]{.underline}\] cycle electric service.
Control electric heater by a magnetic starter with a manually operated
\"on‑off\[ switch in series with a thermostatic control with an
adjustable range.

D. Oil Pumps: Mil. Spec. MIL‑P‑17608 suitable for No. \[[
]{.underline}\] oil at a viscosity of \[[ ]{.underline}\] SSU. Pumps
shall deliver \[[ ]{.underline}\] GPM at a developed head of \[[
]{.underline}\] ft and a suction lift not less than \[[ ]{.underline}\]
ft. Mount pump and direct connected electric motor or steam turbine on
extended base plate. Provide a drip plan with each pump. Use metal
flexible coupling. Provide pressure relief valve on discharge lines,
piped to return line. Provide duplex strainer on suction side. Motor
starters on oil pumps shall be lockable.

2.3 FUEL OIL STORAGE TANK AND ACCESSORIES:

A. Fuel Oil Storage Tanks: Construct fuel oil tanks of steel, fiberglass
reinforced plastic (FRP), or fiberglass reinforced plastic coated steel
to comply with NFPA 30 and NFPA 31. \[Each fuel oil tank shall have a
\[[ ]{.underline}\]‑inch diameter manhole on top, wit the same diameter
extension neck, and bolted cover with gastight gasket\]. Provide
openings for fill, vent, pump suction, oil return, oil level gauge \[,
and oil heater\]. Size vent pipes according to NFPA 30 and NFPA 31 but
not less than 1‑1/4 inches in nominal inside diameter. Vent pipe shall
connect to tapping at high end of tank and shall not extend more than
one inch into tank. \[Extension of vent pipe outside of building shall
be not less than 5 ft horizontally or vertically\].

B. Design, Construction and Testing of Fuel Oil Tanks:

1\. Horizontal steel tanks, regardless of coating type, Mil. Spec.
MIL‑T‑462 or UL 58 or STI P3.

2\. FRP tanks Mil. Spec. MIL‑T‑52777.

3\. Vertical steel tanks API 650 and shall have center sumps with a 5%
slope cone bottom.

4\. Epoxy grout inside roof plate lap joints on API 650 tanks to prevent
moisture entrapment.

C. Connections to Fuel Oil Tanks:

1\. ab Goose‑neck type vent caps or type conforming to Mil. Spec.
MIL‑C‑19902.

2\. Provide fill lines with removable single strainer and lock type fill
boxes.

3\. A sounding connection, to permit entry of the gaging rod, with a
lock type cap.

4\. Pump suction lines with internal vertical pipes extending to within
6 inches of tank bottom.

5\. Design fuel oil supply and fuel oil return piping to allow for ample
tank movement and pipe expansion.

6\. Provide flexible hose connections for vibration isolation of oil
burning equipment.

7\. On FRP tanks provide a 12‑inch by 12‑inch by 1/4‑inch aluminum plate
laminated on inside bottom surface of tank directly below fill pipe and
oil level gaging rod opening. On steel tanks weld a 12‑inch by 12‑inch
by 1/4‑inch steel striker plate.

8\. Provide pipe connections to steel tanks with dielectric fittings.

9\. Provide hold-down straps for steel tanks with inert insulating
dielectric material between strap and tank.

[PART 3: EXECUTION]{.underline}

3.1 INSTALLATION:

A. General Installation Requirements for Oil Piping: Install piping in
out‑of‑the‑way locations, in a manner that will minimize cutting of
beams, girders, columns, or load‑bearing members. Piping shall be free
from traps and shall drain toward tank and equipment. Installation of
oil piping and equipment in buildings shall conform to NFPA 31, except
as indicated or specified herein. Feed line to equipment shall have a
gate valve located near tank.

B. Pipe Sleeves: Provide pipe sleeves where pipes and tubing pass
through masonry or concrete walls, floors, roofs, and partitions.
Sleeves in outside walls below and above grade, in floor, or in roof
slabs, shall be steel pipe. Sleeves in partitions shall be zinc‑coated
sheet steel having a nominal weight of not less than 0.906 lb/sq ft.
Space between pipe, tubing, or insulation and the sleeve shall be not
less than 1/4 inch. Hold sleeves securely in proper position and
location before and during construction. Provide sleeves of sufficient
length to pass through entire thickness of walls, partitions, or slabs.
Extend sleeves in floor slabs 1/2‑inch above finished floor. Firmly pack
space between the pipe or tubing and sleeve with oakum, and caulk on
both ends of sleeve with elastic cement.

C. Floor, Wall, and Ceiling Plates: Secure plates to pipes at sleeves in
buildings. Plates shall be painted cast‑iron, malleable iron, or steel.

D. Steel Piping: Steel piping 2 inches and smaller shall be threaded or
socket‑welded. Steel piping 2‑1/2 inches and larger shall be flanged or
butt‑welded. Piping joints shall conform to ANSI B 31.4.

E. Screwed Joints in Piping: Use cylinder and oil and graphite or
graphite pipe‑joint compound conforming to Mil. Spec. MIL‑T‑5544 applied
to male threads only for making up screwed joints. Red or white lead and
zinc compound conforming to Mil. Spec. MIL‑T‑22361 may be used.
Lubricate threaded pipe joints, as well as bolts and studs used on high
temperature pipe joints up to 1050EF, with anti‑seize compound in
accordance with Mil. Spec. MIL‑A‑907. Piping shall be free from fins and
burrs. Ream or file out pipe ends to size of bore and remove chips.
Attach screwed flanges by screwing the pipe through the flange, and
reface pipe and flange accurately.

F. Copper Tubing: cut with square ends and remove burrs and fins.
Carefully handle and protect tubing. Clean outside surface of tubing
ends and inside recess of fitting to bright metal with wire brush or
abrasive and apply flux to outside surface of tubing ends and on the
recess inside of fittings. Insert tubing to the full depth of fitting,
then braze. Remove stems and washers of solder‑joint type valves before
brazing. Brazing procedure qualification shall be in accordance wit ANSI
B 31.3.

3.2 WELDING:

A. Welding Procedure Specifications: Before any welding is performed,
the Contractor shall submit to the Contracting Officer three copies of
his welding procedure specification for metals included in work,
together with proof of its qualifications as outlined in ASNI B 31.1.

B. Performance Qualification Record: Before any welder or operator shall
perform any welding the Contractor shall also submit to the Contracting
Officer three copies of the Welder\'s Performance Qualification Record
in accordance with ANSI B 31.1 showing that the welder was tested under
the approved procedure specification submitted by the Contractor. In
addition, the Contractor shall also submit each welder\'s assigned
number, letter, or symbol which shall be used to identify the work of
the welder and which shall be affixed immediately upon completion of the
weld. Welders making defective welds after passing a qualification test
shall be given a requalification test and upon failing to pass the test
shall not be permitted to work this contract.

C. Previous Qualifications: Welding procedures, welders, and welding
operators previously qualified by test may be accepted for this contract
without requalfication subject to the approval of the Contracting
Officer and provided that the conditions specified in ANSI B 31.1 are
met before a procedure can be used.

D. Welding of Piping: Welding of joints in piping, butt welds, fillet
welds, bends, loops, offsets, and cleaning of pipe shall be in
accordance with ANSI B 31.1.

E. Quality of Welds: Quality of welds, correction of defects, stress
relieving, and preheating shall be in accordance with ANSI B 31.1.

F. Arc Welding and Gas Welding: In accordance with ASME Boiler and
Pressure Vessel Codes, Section IX.

3.3 ACCESSORIES:

A. Unions and Flanges: Place unions and flanges where necessary to
permit easy disconnection of piping apparatus. Each connection having a
screw end valve shall have a union. In long lines inside buildings,
place unions and flanges not further apart than 100 ft, except in pipe
lines of welded construction. Unions and flanges shall be as specified.

B. Valves: Install valves in positions accessible for operation and
repair. Install check valve and a gate valve on suction line of each
fuel oil storage tank.

C. Thermometers: Provide thermometers and thermal sensing elements of
control valves with separable sockets. Install separable sockets in pipe
lines in such a manner to sense the temperature of flowing fluid and
minimize obstruction to flow.

3.4 FUEL OIL STORAGE TANKS:

A. General: Install storage tanks and vents and other connections in
accordance with NFPA 30, NFPA 31, recommendations and published
instructions of the manufacturer, and as indicated. Concrete shall have
a compressive strength of \[[ ]{.underline}\] psi, \[3/4 inch\] \[[
]{.underline}\] maximum aggregate size and \[3 to 4\] \[[
]{.underline}\] inches slump. Materials for sand, gravel, and concrete
shall meet requirements specified in Section \[03300 ‑ Structural
Concrete.\] \[Section 03316 ‑ Structural Concrete, Minor Quantities.\]
Excavation and backfill for storage tank installation shall comply with
Section ????? ‑ Earthwork.

B. Aboveground Fuel Oil Tanks: Set aboveground fuel oil tanks on firm
foundation of masonry, concrete, or steel conforming to shape of tank,
or on heavy angle knees welded to tank.

C. Underground Fuel Oil Tanks: Tanks shall rest on a full length
concrete pad with hold down straps. Provide a minimum of 6 inches of
clean sand between steel tank and pad and a minimum of 12 inches of pea
gravel between fiberglass reinforced plastic tank and pad. Tanks shall
have a cover of earth of not less than 2 ft in non‑vehicular traffic
areas and a cover of not less than 3 ft in vehicular traffic areas, with
pipe connections at top of tank.

D. Backfill: Backfill for steel tanks may be either sand or pea gravel.
Backfill for fiberglass reinforced plastic tanks shall be pea gravel.
Backfill shall be well compacted, particularly under the tanks, in order
to provide adequate support. Before placing tank into excavation,
foreign materials shall be cleaned from tank. Excavation shall be free
from all materials that may cause damage to the tank or tank coating.
Tanks shall be carefully lifted and slowly lowered into the ground.
Under no circumstances shall lifting devices damage the tank or tank
coating. Handle tanks during transportation in such a manner as to
prevent damage to tank and protective coating.

3.5 FIELD TESTS:

A. General: Prior to application of test pressure, remove or valve off
piping components which may be damaged by test and install a currently
calibrated test gauge in the system. Maintain test pressure for at least
one hour. In the event of leakage, locate and repair leak and repeat
test.

B. Piping Test: Before backfilling of pipe trenches, perform hydrostatic
test of fuel oil piping with No. 2 fuel‑oil at 1‑1/2 times system
pressure or 100 psig, whichever is greater.

C. Steel Fuel Oil Storage Tanks: Field‑test tanks in accordance with
Method A of Manufacturing and Production Tests of Ul 142, except that
the underground tanks shall be tested for leaks both before and after
being placed in the trench. Mechanical caulking is not permitted for
correcting leaks in tanks.

D. Fiberglass Reinforced Plastic Tank (FRP): Tests in accordance with
Mil. spec. MIL‑T‑52777.

PART 4: MEASUREMENT AND PAYMENT

4.1 METHOD OF MEASUREMENT:

A. Units: The work described in this section will not be measured for
payment.

4.2 BASIS OF PAYMENT:

A. Payment: No direct payment for the work described under this section
will be made. Contractor shall include consideration for this item in
the bid price for other items of the Contract.

END OF SECTION