335100 - natural-gas distribution.doc

SECTION 335100

natural‑GAS distribution

PART 1 – GENERAL

1.01 Related Documents

A.

Drawings and general provisions of the Contract, including General and Supplementary Conditions and Division 01 Specification Sections, apply to this Section.

1.02 Summary

A.

Section Includes:

1.

Material, labor, tools, equipment, and services necessary for and incidental to the provision of gas service, including – but not limited to:

a.

Installation of a [6] [3] [1] [_____]‑inch NPS [polyethylene] underground gas service line (with tracer wire) from the Local Natural Gas Supplier's existing service stub [as indicated on the Drawings] to a [1] [_____]‑inch gas building stub, located at the proposed building expansion.

b.

Installation of an intermediate pressure gas service regulator (furnished by the Local Natural Gas Supplier).

c.

Installation of detectable underground marking tape above new polyethylene line.

d.

Excavation and fill, testing, and incidentals necessary to complete the Work.

B.

Related Sections:

Section 312333 – Trenching and Backfilling: Specifies trench excavation, excavation below trench subgrade, and trench backfill.

1.03 References

Definitions:

The Drawings:

The Work shown on the Drawings is intended to be approximately to scale with the exception of details noted "No Scale" or "Not to Scale."

The Drawings show sizes of piping and runs of piping, but are not intended to show every pipe run, offset, fitting, and device, nor structural difficulty that might be encountered.

Provide parts necessary to make complete working systems ready for use as required to carry out the true intent and purpose of the Drawings.

2.

NPS = Nominal pipe size. A dimensionless designator that has been substituted in this Section for such traditional terms as nominal diameter, size, and nominal size.

3.

Or approved equal = Products similar to those listed immediately above and equivalent in quality, function, durability, and longevity (as determined by the Contracting Officer).

Reference Standards:

American National Standards Institute (ANSI): Building Services Piping (ANSI B‑31.9).

American National Standards Institute (ANSI) / American Water Works Association (AWWA): Polyethylene Encasement for Ductile‑Iron Piping Systems (ANSI A21.5 / AWWA C‑105‑99).

ASTM International:

Standard Specification for Pipe, Steel, Black and Hot‑Dipped, Zinc‑Coated, Welded and Seamless (ASTM A‑53 / A-53M‑00).

Standard Specification for Piping Fittings of Wrought Carbon Steel and Alloy Steel for Moderate and High Temperature Service (ASTM A‑234 / A‑234M‑00a).

Standard Test Method for Melt Flow Rates of Thermoplastics by Extrusion Plastometer (ASTM D‑1238‑00).

Standard Specification for Polyethylene Plastics Extrusion Materials for Wire and Cable (ASTM D‑1248‑02).

Standard Test Method for Time‑to‑Failure of Plastic Pipe Under Constant Internal Pressure (ASTM D‑1598‑97).

Standard Test for Resistance to Short‑Time Hydraulic Pressure of Plastic Pipe, Tubing, and Fittings (ASTM D‑1599‑99).

e.

Standard Test Method for Environmental Stress‑Cracking of Ethylene Plastics (ASTM D‑1693‑00).

Standard Specification for Polyethylene (PE) Plastic Pipe (SIDR‑PR) Based on Controlled Inside Diameter (ASTM D‑2239‑99).

Standard Specification for Thermoplastic Gas Pressure Pipe, Tubing, and Fittings (ASTM D‑2513‑00).

f.

Standard Test Method for Obtaining Hydrostatic Design Basis for Thermoplastic Pipe Materials (ASTM D‑2837‑01).

g.

Standard Specification for Polyethylene Plastics Pipe and Fittings Materials (ASTM D‑3350‑02).

4.

American Society of Mechanical Engineers (ASME): Malleable Iron Threaded Fittings (ASME B‑16.3).

American Welding Society (AWS): Structural Welding Code – Steel (D‑1.1 / D‑1.1M‑02).

5.

Dominion East Ohio: Standards for Customer Owned Service Lines and Meter Setting Installations.

6.

The Local Natural Gas Supplier's published standards for customer‑owned service lines and meter‑setting installations.

7.

NFPA International: National Fuel Gas Code (NFPA 54‑1999).

8.

The Plastic Pipe Institute (PPI): [_____].

1.04

SUBMITTALS

Product Data and Shop Drawings: Submit six copies of Manufacturer's cuts, catalog cuts, working drawings, certified test reports, performance data, and the like, for each of the following to the [Architect/Engineer] [Contracting Officer] for review including certificates indicated. Mark each item, making reference to the applicable page and paragraph numbers of the Specifications prior to submittal. Deliver to the [Architect/Engineer] [Contracting Officer] as one complete package.

Polyethylene gas service line, fittings, joints, couplings, and gaskets.

Intermediate pressure gas service regulator.

Gas valves.

Steel piping, fittings, joints, couplings, and adapters.

Other materials specified under this Section.

B.

Quality Control Submittals: Submit certificates of compliance and shop tests to the [Architect/Engineer] [Contracting Officer] for review.

C.

Contract Closeout Submittals:

Operation and Maintenance Data: Submit the following to the [Architect/Engineer] [Contracting Officer] for review:

Recommended Spare Parts List.

Maintenance, Operation and Service Manuals.

Final Certification: Upon completion of the Project and before final acceptance, deliver to the [Architect/Engineer] [Contracting Officer] a statement signed by the principal officer of the contracting firm stating that the gas service piping:

Is satisfactory.

Is in complete accordance with the Drawings, the Specifications, and the Manufacturer's prescribed procedures.

Has been found to be tight.

Is in compliance with all state and local codes covering such installations.

1.05

QUALITY ASSURANCE

Regulatory Requirements:

Accomplish the Work per the laws, ordinances, regulations, and codes of the State of [Ohio] [_____], the Local Natural Gas Supplier, and other local, county, state, or federal authorities having jurisdiction (AHJ) and the applicable requirements of NFPA 54.

Obtain and pay for all necessary inspection fees, certificates, and permits pertinent to the construction and installation of the gas service system.

Conform welding procedures to applicable state labor regulations.

Certifications:

Contractor performing installation shall be certified to do so by the Local Natural Gas Supplier.

Welders shall be certified per Section 9 of ANSI B‑31.9.

1.06 DELIVERY, STORAGE, and handling

A.

Coordinate the delivery and receipt of equipment and materials at the Site so that installation is made in proper sequence and with a minimum loss of time.

B.

Inspect materials delivered to the Site for damage.

C.

Unload materials with a minimum of handling.

D.

Provide suitable means of protection for materials intended to be used in the Work. Store materials at the Site in enclosures or under protective covering. Do not store materials directly on the ground.

Store polyethylene piping under cover out of direct sunlight.

Keep inside of pipes and fittings free of dirt and debris.

E.

Handle pipe, fittings, valves, and other accessories in such a manner as to ensure delivery to the trench in sound undamaged condition.

Take special care to avoid injury to coatings and linings on pipe and fittings. Make satisfactory repairs if coatings or linings are damaged.

F.

From the commencement of the Work until its completion and acceptance by the Owner, the Contractor shall be solely responsible for:

Storage and care of required equipment and materials.

Injury or damage to the same, from whatever cause. Damage shall be repaired by the Contractor at no additional cost to the [Government] [Owner], before final payment is made.

1.07 sequencing and scheduling

A.

Coordination: Arrange the Work so that there will not be any delay in the proper installation and completion of any part or parts of the gas service system.

1.08 Warranty

A.

Name the [Government] [Owner] on the Manufacturer's guarantee and submit to the [Architect/Engineer] [Contracting Officer].

PART 2 – PRODUCTS

2.01

MATERIALS

A.

General: Materials and equipment provided by the Contractor for use in this Contract shall be new and suitable for conditions and duties imposed on them after installation. Where applicable, materials and equipment shall bear the approval label of the Underwriters Laboratories (UL), Incorporated.

2.02

POLYETHYLENE GAS SERVICE LINE AND HOUSE LINE

A.

Melt Flow: Less than 5.0 gms/ten minutes per ASTM D‑1238.

B.

Resistance to Environmental Stress‑Cracking: Exceeding 1,000 hours per ASTM D‑1693.

C.

Hydrostatic Design Stress Rating: 730 PSI per ASTM D‑2837.

D.

Burst Pressure: 560 PSI (minimum) at 73.4 degrees Fahrenheit per ASTM D‑1599.

E.

Mold or fabricate fittings from high‑density polyethylene (HDPE).

F.

Join pipes to one another by the thermal butt fusion system.

G.

Fittings shall be solvent‑welded.

H.

Acceptable Product: [3] [6]‑inch NPS DRISCOPIPE 8100 gas service pipe as manufactured by Phillips 66 meeting the requirements of PE‑3455446 and PPI‑PE‑3408 per ASTM D‑3350. [Subject to compliance with the requirements of this Section – and with the provisions of the Buy America Act (BAA), provide either the product named above or one of the comparable products listed below:]

[_____] by [_____].

Or approved equal.

2.03

DETECTABLE UNDERGROUND MARKING TAPE

A.

Provide underground polyethylene gas service piping with a detectable underground marking tape buried approximately 8 inches below finished grade.

Tape shall be color coded for gas service with a coated imprinted message and reinforced protective plastic jacket bonded to a foil core (detectable). Tape shall be 9.1‑mils thick with a tensile strength of 135 pounds for a 3‑inch tape. Warning and identification shall be "Caution Buried Gas Line Below" or similar wording. Tape shall be Terra‑Tape Sentry‑Line, as manufactured by Reef Industries of Houston TX. [Subject to compliance with the requirements of this Section – and with the provisions of the Buy America Act (BAA), provide either the product named above or one of the comparable products listed below:]

Or approved equal.

2.04 INTERMEDIATE PRESSURE GAS Service REGULATOR

A.

The Local Natural Gas Supplier will provide the service regulator.

2.05

GAS VALVES

A.

Service Line Valves: Rated by the Valve Manufacturer to operate at a minimum of 100 PSIG.

2.06

PIPING, BURIED

A.

Use steel piping where indicated on the Drawings.

B.

Buried Steel Pipe: Black steel per ASTM A‑53 or ASTM A‑53, Schedule 40.

C.

Fittings: ASTM A‑234 / A‑234M forged steel, welding type, with polyethylene jacket per ANSI A21.5 / AWWA C‑105, or double‑layer, half‑lapped 10‑mil polyethylene tape.

D.

Weld joints per ANSI B‑31.9.

2.07

PIPING, ABOVE GROUND

A.

Gas Service Piping Above Ground: Black steel per ASTM A‑53, Schedule 40.

B.

Fittings: Malleable iron threaded fittings per ASME B‑16.3.

C.

Joints: Per NFPA 54, threaded per ANSI B‑31.9.

D.

Paint pipe and fittings with one coat of primer and two coats of epoxy paint.

E.

Pipe passing through wall or floor sleeves shall be wrapped with tape approved by the Local Natural Gas Supplier at least 2 inches beyond inside and outside of wall and 8 inches above grade.

2.08 wELDING mATERIALS

A.

Conform to ANSI B‑31.9.

Part 3 – EXECUTION

3.01

EXAMINATION

A.

Verification of Conditions: Inspect the Site and perform any test pit investigations as might be required to verify location and depth of existing utilities and/or subsurface structures within the areas of the Work.

3.02 Preparation

A.

Maintain Existing Utilities: Exercise utmost care to avoid damage to electric, telephone, sewer and water lines, roads, and all appurtenances thereto.

3.03

INSTALLATION

General:

Furnish materials, perform excavation and fill, construct necessary joints and connections, construct appurtenances, dispose of surplus excavation, and discard materials as necessary to complete the gas service system.

Install materials and equipment complete in a first class manner and per modern methods and practice.

Installed material or equipment that does not present an orderly and reasonably neat or workmanlike appearance shall be removed and replaced when directed by the [Architect/Engineer] [Contracting Officer]. Such removal and replacement shall be done at no additional cost to the [Government] [Owner].

Install equipment per the Equipment Manufacturer's recommendations and requirements of the Local Natural Gas Supplier.

Positioning of equipment shall be performed in a manner to prevent marring, scratching, gouging, or any other damage or deformation to the equipment.

Install and securely anchor equipment plumb, level, and true to line for proper operation.

Pile excavated material in a manner that will not endanger the Work and will not obstruct access to the Site.

Keep gutters and ditches clear at all times or make other satisfactory provisions. Do not obstruct drainage of natural watercourses.

The following items might cause a hazard or serve as an obstruction to either vehicular or pedestrian traffic. To protect persons from injury and to avoid property damage, enclose the following using fences or barricades and complement with adequate lighting:

Trenches.

Excavated pits

Equipment.

Pipe and other materials.

Temporarily support, adequately protect, and otherwise maintain underground utilities and surface structures, and other obstructions encountered in the progress of the Work.

8.

Removal of Water: At all times during construction, provide proper and satisfactory means and devices for the removal of water entering the excavated area. Remove such water as fast as it may collect to avoid interference with the prosecution of the Work (the proper placing of pipe, masonry or other materials).

Trenching:

Handle the joined pipeline in such a manner that the pipe is not damaged by being dragging over sharp and cutting objects. Sections of the pipes with deep cuts and gouges shall be cut out, and the ends of the pipeline rejoined.

Place pipe in sand or pea gravel bedding material as detailed on the Drawings.

The trench bottom shall be free of stumps, stones, boulders, rocks, frozen clods, and similar objects. Where trench is made through rock, excavate to 8 inches below proposed grade and backfill to grade with compacted materials acceptable to the [Architect/Engineer] [Contracting Officer].

Perform butt fusion of pipes and fittings per the Pipe Manufacturer's recommendations as to equipment and technique.

Keep pipe trenches free of water and as dry as possible during bedding, laying and jointing and for as long a period as required.

When the Work is not in progress, open ends of pipe and fittings shall be satisfactorily closed so that no trench water or other material enters the pipe or fittings.

As soon as possible after the joint is made, place sufficient backfill material along the pipe to prevent pipe movement off line or grade.

3.04

FIELD QUALITY CONTROL

Tests:

General:

Conduct testing in the presence of the Architect/Engineer and local and State inspectors having jurisdiction. Give sufficient advance notice of conducting such tests.

Furnish required labor, tools, materials, and equipment for such tests, including pumps, compressors, stopwatch, gauges and meters, subject to acceptance by the [Architect/Engineer] [Contracting Officer].

If any imperfections or leaks are detected by the tests, they shall be corrected by repair or replacement of defective materials as directed by the Local Natural Gas Supplier or the [Architect/Engineer] [Contracting Officer], and then re‑tested.

Piping: Test gas service line per NFPA 54 to 150 percent of maximum system pressure or 90 PSIG (whichever is greater). Chart results over a 24 hour period.

3.05 Protection

Provide suitable means of protection for the completed Work.

END OF SECTIOn 33 51 00

335100-10

NATURAL‑GAS DISTRIBUTION

12910-330

Revised 3/2/09

12910-330

NATURAL‑GAS DISTRIBUTION

335100-9

Revised 3/2/09