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REMOVE THIS OUTLINE GUIDE BEFORE PLACING

THE SPECIFICATION SECTION IN THE CONTRACT

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O U T L I N E G U I D E

[DIVISION 15: MECHANICAL]{.underline}

SECTION 15489 ‑ NATURAL GAS SYSTEMS

USE: Furnishing and Installing a natural gas system within the building
to a point 5-ft outside the building. Unique job requirements may
require specific coverage in the following specification sections:

**NOTES TO SPECIFIER:**

A. Options within paragraphs are identified by enclosure in brackets;
blank spaces enclosed by brackets \[[ ]{.underline}\] 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/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 specifications 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) 987-6851.

F. DESIGN NOTES:

1\. **DRAWING DATA REQUIRED:**

**REVISIONS OF THIS SECTION:**

CSI format, editorial changes 10/99

Metric: Not Applicable

Technical Update: 04/00

SECTION 15489

NATURAL GAS SYSTEMS

[PART 1: GENERAL]{.underline}

1.1 SUMMARY

A. Section Includes: \[Furnishing\] \[and\] \[installing\] a natural gas
system within the building to a point 5-ft outside the building
operating at a pressure not exceeding \[15\] psi.

B. Related Sections:

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LIST ITEMS OF WORK THAT MIGHT LOGICALLY BE FURNISHED AND INSTALLED UNDER
THIS SECTION, BUT INSTEAD ARE SPECIFIED IN ANOTHER SECTION. THIS ARTICLE
IS RARELY REQUIRED.

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Testing of Piping Systems Section 02518

1.2 SUBMITTALS

A. General: Submittals shall be according to Section 01330 ‑ Submittal
Procedures.

B. Manufacturer\'s Literature: Submit \[[ ]{.underline}\] copies of the
manufacturer\'s descriptive data for the service regulator to be used on
this project.

C. Shop Drawings: Submit \[[ ]{.underline}\] copies of shop drawings for
the pipe fittings and accessories to be used on this project. Drawings
shall be \[same\] \[larger\] scale as the full size Contract Drawings.

[PART 2: PRODUCTS]{.underline}

2.1 MATERIALS

A. Above Ground Pipe: Shall meet ASTM A53, Schedule 40, and have
threaded ends for sizes 2 inches and smaller; otherwise plain and
beveled for butt welding.

B. Threaded Fittings: Shall be according to ANSI B16.3, black malleable
iron.

C. Socket‑Welding Fittings: Shall be according to ANSI B16.11, forged
steel.

D. Butt‑Welding Fittings: Shall be according to ANSI B16.9, with backing
rings of compatible material.

E. Unions: Shall be according to ANSI B16.39, black malleable iron.

F. Plug Cock: Shall be according to ANSI B16.15, brass or bronze, as
manufactured for natural gas service.

G. Insulating Fittings: Nylon bushings, nut or flange type dielectric
unions, or dielectric couplings, consisting of an insulating gasket
under a metal sheath and over pipe ends, capable of preventing flow of
electric current.

H. Gas Meters: Shall be as required by \[[ ]{.underline} utility
company\] \[and\] \[NFPA 54.\]

I. Building Service Regulators: Mechanical and safety shut‑off service
regulator to shut off the flow of gas entirely if the downstream
pressure exceeds the regulator setting by 14‑inch water column or if
there is a failure of supply pressure. Regulator casing fitted with
rainproof construction and vent in tamperproof enclosure.

J. Pipe Hangers and Supports: Shall conform to the requirements of MSS
SP-58.

[PART 3: EXECUTION]{.underline}

3.1 PREPARATION

A. Existing Gas Service: Deactivate all natural gas service not to be
used by closing the street valve and capping the piping at the inside of
the \[building\] \[basement\] wall. Modify existing natural gas service
as shown on the drawings and as specified herein.

3.2 INSTALLATION

A. General:

1\. Clean pipe before installation.

2\. Remove internal scale.

3\. Ream pipe ends after cutting.

4\. For screwed joints, apply noncorrosive, nonhardening teflon pipe
thread compound or teflon tape to male threads only.

5\. Install gas piping and accessories according to NFPA No. 54.

6\. Install gas piping parallel with building walls or structure. The
lower end of all vertical supply piping near equipment shall terminate
with a tee, nipple and cap to serve as a sediment trap.

7\. Install a gas cock and union in the pipe adjacent to each appliance,
in such a manner that the appliance may be removed without disturbing
the gas piping.

B. Hangers, Supports and Anchors: Shall be installed according to
Section 3.3.6 of NFPA 54.

C. Gas Service: Tie into local gas company gas meter at the building.

3.3 FIELD QUALITY CONTROL

A. Leak Testing: Shall be according to Section 02518 - Testing of Piping
Systems.

B. Purging: After piping has been checked, the Contractor shall fully
purge the gas piping according to the following:

1\. Do not purge piping into the combustion chamber of an appliance.

2\. Do not purge open end of piping systems into confined spaces or
areas where there are sources of ignition, unless the space is
adequately ventilated, purging rate is controlled, and all hazardous
conditions are eliminated.

C. Lighting Pilots: After purging the gas piping, the Contractor shall
purge all appliances and light pilots before leaving the premises.

3.4 TRAINING OF GOVERNMENT EMPLOYEES

A. Requirements: See Section 01780 - Closeout Submittals.

[PART 4: MEASUREMENT AND PAYMENT]{.underline}

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. The Contractor shall include consideration for this item
in the bid price for other items of the Contract.

END OF SECTION