GAS SERVICE SPECIFICATIONS IN GENERAL
Sections:
General.
For all forms of development, this chapter provides the general requirements for gas service to be developed and implemented by the developer, subdivider, owner, or contractor (to include residential, commercial, industrial, and professional office). A valid Utah E100 or S410 license is required for contractors installing gas lines.
A. All pipeline installations must comply with 49 CFR Part 192 and ASME B31.8, with the wording of 49 CFR Part 192 taking precedence over ASME B31.8. The Utah State Division of Public Utilities Pipeline Safety must oversee all installations.
B. Steel Piping Welding Welding of piping must follow certified methods and be performed by performance-qualified welders and welding operators. According to ASME 17, procedures and welders must be qualified. As approved by ASME B31.1, welding techniques certified by others, as well as welders and welding operators certified by another employer, may be accepted. The engineer must be contacted at least 24 hours before the testing, and the tests must be conducted on-site if possible. A copy of qualifying processes, as well as a list of qualified welders and welding operators’ names and identification symbols, must be provided to the engineer. As a permanent record, the welder or welding operator must place his designated symbol near each weld he makes.
C. Polyethylene Piping Jointing In line with AGA-01, piping shall be joined by performance-qualified joiners using qualified processes. Joining processes that have been prequalified by the manufacturer must be employed. In the joining processes employed in accordance with AGA-01, all joints must be inspected by a qualified inspector. At the job site, a person who has been trained and certified by the pipe manufacturer to train and qualify joiners and inspectors in each joining method to be used on the job must train and qualify joiners and inspectors in each joining procedure to be used on the job. The usage of equipment, explanation of the technique, and successfully producing joints that pass the AGA-01 tests are all part of the training. The contractor must submit a copy of the training procedure as well as the trainer’s qualifications to the engineer for approval. To qualify joiners and inspectors, the engineer must be notified at least 24 hours ahead of time. The contractor must send a copy of each inspector’s and joiner’s training and test results to the engineer.
D. Common Products. Materials and equipment must be standard products from a producer who is routinely engaged in the production of the products and must substantially duplicate things that have been in good working order for at least two years previous to the bid opening. Asbestos or asbestos-containing items must not be utilized. Equipment must be supported by a service organization that is fairly close to the site, in the engineer’s view. MSS SP-25 specifies the marking of valves, flanges, and fittings.
E. Dimensions verification. Before beginning construction, the contractor must get familiar with all job details, verify all dimensions in the field, and notify the engineer of any discrepancies.
F. Manipulation Pipe and components must be handled with care during shipping, delivery, and installation to ensure that they arrive in good shape. It is very important not to harm the pipe covering. After the coating has been applied, no pipe or material of any sort may be inserted within another pipe or fitting, unless otherwise indicated in EMMC 15.75.110, Installation. Plastic pipe must be handled according to AGA-01.
G. To the degree that they are cited, the publications listed below are part of this chapter. The publications are simply referred to by their fundamental titles in the text.
Pipeline Valves (June 1998, 19th Edition) (Steel Gate Plug, Ball, and Check Valves)
Socket-Type Polyethylene Fittings for Outside Diameter-Controlled Polyethylene Pipe and Tubing (Socket-Type Polyethylene Fittings for Outside Diameter-Controlled Polyethylene Pipe and Tubing) (Socket-Type Polyethylene Fittings
Butt Heat Fusion Polyethylene (PE) Plastic Fittings for Polyethylene (PE) Plastic Pipe and Tubing (Butt Heat Fusion Polyethylene (PE) Plastic Fittings for Polyethylene (PE) Plastic Pipe and Tubing (Butt Heat Fusion Polyethylene (PE) Plastic Fittings
(1986; December 1986, December 1987, December 1988) Section VIII, Division 1, Pressure Vessels of the Boiler and Pressure Vessel Code
(1986; December 1986, December 1987, December 1988) Section IX, Welding and Brazing Qualifications, of the Boiler and Pressure Vessel Code
Manually Operated Thermoplastic Gas Shutoffs and Valves in Gas Distribution Systems (Manual Thermoplastic Gas Shutoffs and Valves in Gas Distribution Systems) (Manual Thermoplastic Gas Shutoffs
Coal-tar Protective Coatings and Linings for Steel Water PipelinesEnamel and TapeHot-Applied Coal-Tar Protective Coatings and Linings for Steel Water PipelinesEnamel and TapeHot-Applied Coal-Tar Protective Coatings and Linings
VALVE AND FITTING INDUSTRY MANUFACTURERS STANDARDIZATION SOCIETY, INC (MSS)
(1974) Electrical Inspection of Pipeline Coatings Before Installation at High Voltage
Service conditions.
A. All infrastructure constructed within Eagle Mountain City must be approved by the utility. Usual cross-sections are provided to indicate the proposed lines’ typical locations.
B. Approvals Are Necessary. Eagle Mountain City must approve all distribution work before any connections may be made.
C. Requirements for Extension. When providing service necessitates the addition of the utility’s distribution or transmission lines, or other facilities, the owner or developer is responsible for their installation.
Nominal Service (D). Two-inch 40 psi polyethylene pipe shall be used for service.
E. Utility Upkeep Responsibilities From the meter to and including the infrastructure in the utility’s right-of-way or easements, the utility must own, operate, and maintain its service laterals and lines.
Meter, F. The utility will provide the meter, which will be covered by the hookup cost.
G. Disposal. Before the contractor leaves the project site, all trash and scrap pipe must be removed. Garbage is also not to be buried in ditches.
Damages (H). If a contractor damages a pipeline and is certified to repair it, they may do so with the agreement of the gas supervisor. Eagle Mountain City will do the repair if the contractor is not qualified, and the contractor will be paid appropriately. Any damage or ding that is more than 10% of the thickness of the wall must be taken out and replaced. If any piece of machinery comes into contact with pipe, it must be replaced.
Blue Stakes, No. 1 Excavation requires a valid Blue Stake ticket and the appropriate license. A stop work order and/or fines will be issued if this rule is broken.
Type of service.
A. Intensity The greatest pressure that the infrastructure can provide is 40 psi.
B. Unusual Circumstances The city maintains the right to impose special requirements if the system is subjected to an unusual extension or demand.
A pressure regulator is a device that regulates the amount of pressure in a system. The developer or owner is responsible for keeping the house in good repair and protecting it from potential pressure spikes.
Utility specification.
1. Steel pipe shall be seamless or electric resistance welded to ASTM A53, Grade A or B, Type E or S, or API Specification 5L, as stipulated in ASME B31.8.
2. Flanged fittings two inches and larger must comply with ASME B16.5, Class 150, and buttweld fittings must comply with ASME B16.9.
B. Forged Steel Branch Connections Carbon steel, ASTM A181, Class 60, is required for all connections.
Flange gaskets are a type of gasket that is used to seal a flange. Gaskets must be made of non-asbestos compressed material, one-sixteenth-inch thick, full face or self-centering flat ring type, in line with ANSI B16.21. The gaskets must be made of aramid fibers bonded with styrene butadiene rubber (SBR) or nitrile butadiene rubber (NBR) and capable of withstanding temperatures up to 600 degrees Fahrenheit while meeting ASME B31.8 criteria.
Pipe, tubing, fittings, and joints made of polyethylene. ASTM D3350 and ASTM D2513, pipe designations PE 2306 and PE 3406, rated SDR 11 or below, are required for polyethylene pipe, tubing, fittings, and joints, as specified in ASME B31.8. Pipe sections must be marked in accordance with ASTM D2513. Butt fittings must meet ASTM D3261, whereas socket fittings must meet ASTM D2683. Fittings must be rated for the same service as the pipe.
Sealing Compound is the first step. The joint sealing compound must meet the requirements of UL-60, Class 20 or less.
2. Make a tape. MS MIL-T-27730 applies to tetrafluoroethylene tape.
Identification (G). As needed by the engineer, pipe flowing markings and metal tags for each valve, meter, and regulator must be given.
H. Joint Insulation Materials. Where indicated, insulating connection materials between flanged or threaded metallic pipe systems must be provided to control galvanic or electrolytic action.
Threaded Joints are the first type of joint. Steel body nut type dielectric type unions with insulating gaskets are required for threaded pipe joints.
Flanged Joints (I). Flanged pipe joints must include full face sandwich-type dielectric flange insulating gaskets, insulating sleeves for flange bolts, and insulating washers for flange nuts.
Gas Transition Fittings, J. Gas Transition Fittings, J. Gas Transition Fittings, J Gas transition fittings must be made of steel and authorized for use with steel and polyethylene pipe.
1. Polyethylene pipe SDR PE 2406 shall be used for all low-pressure pipes in accordance with ASTM D2513. The minimum depth is 36 inches.
2. Steel pipe Grade B or X-42 shall be used for all high-pressure pipes. The minimum depth is 42 inches.
3. Polyethylene pipe shall be used for service lines. A minimum depth of 24 inches is required.
L. Valves must be suitable for shutdown or isolation service and must meet the following requirements: API Specification 6D, carbon steel, buttweld, Class 150 with square wrench operator adapter is required for steel valves two inches and greater installed underground.
Steel Valve Operators M. Steel Valve Operators M. Steel Valve Operators M. Steel Val Operators for valves eight inches and greater must be worm or spur gear, completely enclosed, lubricated, packed, and sealed. Open and closed stops, as well as position indicators, must be available to the operator. Where noted, a locking function must be supplied. Suitable extensions for lubricant application shall be supplied whenever the lubricant connections are not easily accessible. Valves must be lubricated using a lubricant that is suitable for gas service.
One-half-inch to eight-inch N. Polyethylene Valves Only ASME B16.40-compliant polyethylene valves for subterranean installation are allowed. Contractors can use polyethylene valves in sizes ranging from half an inch to eight inches with polyethylene distribution and service lines as an alternative to steel valves.
Dead End Markers are a type of marker that is used to indicate the end of a path A dead end marker must be placed at the termination of all gas lines. For dead end indicators, no scrap pipe can be utilized. For a locate point, the locate wire must be run up the dead end marker above grade. A marker sign and locate wire must also be set up every 500 inches on mains in underdeveloped areas for locating purposes. Eagle Mountain City will be putting up signs.
Right-of-way.
A. Building in the Right-of-Way. Utility distribution and transmission lines and appurtenances will be built within the right-of-way or public utility easements of streets, roads, or alleys to the degree possible. The utility will construct and install its infrastructure on private rights-of-way if it is not practical to do so within the limitations of streets, highways, alleyways, or other public thoroughfares, in the opinion of the utility.
B. Right-of-Way Provisioning Whenever utilities require private rights-of-way, the property owner shall supply or assist in gaining such rights-of-way, without charge to the utility, and will help the utility in securing such other rights-of-way as may be required to provide service to the developer.
Access to premises.
A. Premises Utility Access. Any properly designated utility representative shall have unfettered access to and from the consumer’s premises at all reasonable hours for the purpose of inspecting the consumer’s installations and gas equipment, as well as reading, repairing, testing, or removing the utility’s meter or property. Utility representatives shall have prompt and unrestricted access to the consumer’s premises if, in the view of the utility, emergency conditions exist with respect to the utility’s service.
Excavation and backfilling.
A. Earthwork must follow the guidelines outlined in EMMC Chapter 15.30, Excavation and Backfill for Trenches.
B. Excavation in the High-Pressure Zone Any excavation near a high-pressure area must be overseen at all times by Blue Stake personnel and/or the gas department. Before backfilling, any exposed high-pressure lines should be inspected for damage.
Workmanship and defects.
Pipe, tubing, and fittings must be free of cutting burrs, structural faults, and threading defects, and they must be properly brushed and chip- and scale-blown. Pipe, tubing, and fittings with flaws are not to be fixed. If a system contains damaged pipe, tubing, or fittings, the problematic material must be replaced.
Protective covering.
A. Underground Steel Pipe Protective Covering. Protective coatings must be applied mechanically in a factory or field plant particularly equipped for the purpose, unless otherwise indicated. The protective covering must be applied by hand to valves and fittings that cannot be coated and wrapped automatically, preferably at the same factory that applies the covering to the pipe. Hand-coating and wrapping of joints is required. Hand coating and wrapping must be done in a way and with materials that result in a covering that is the same thickness as the mechanically applied covering. The appropriate protective coating must also be applied to piping installed in valve boxes or manholes. One of the following coatings shall be used:
Coating System No. 1 During installation, the coating system must be inspected for holes, voids, cracks, and other damage.
2. Pipe Coatings Inspection Before installation, any damage to the protective covering that occurred during shipment and handling must be remedied. After field coating and wrapping, the entire pipe must be inspected using a full ring, spring-type coil electrode and an electric holiday detector with impressed current in accordance with NACE RP-02. When a holiday is detected, the holiday detector must be equipped with a bell, buzzer, or other audible signal that sounds. All breaks in the protective covering must be repaired as soon as they are discovered. The engineer will verify the potential of the holiday detector on a regular basis to determine its suitability. The contractor is responsible for providing all labor, materials, and equipment required for the inspection.
3. Surfaces that are ferrous. Surfaces that have been shop primed should be touched up with ferrous metal primer. Solvent-clean any surfaces that haven’t been shop primed. Surfaces containing loose rust, loose mill scale, or other foreign contaminants must be mechanically cleaned (or commercially sandblasted) before being primed with ferrous metal primer. Two coats of exterior oil paint should be applied to the primed surface.
Installation.
A. The contractor is responsible for installing the distribution system, including all testing and inspection fees.
1. All work must be completed in accordance with 49 CFR Parts 191 and 192 of the Department of Transportation (DOT).
2. Illustrations. Before work may be accepted, it must have as-built drawings. Unless the municipal inspector specifies otherwise, mains will be built according to approved plans. All as-builts will be required by Eagle Mountain City in both an electronic and a hard copy format.
3. Pipe installation. Before any fusing can be done, fusers must pass Eagle Mountain’s written and fusion tests. Pipes must have slack in them to allow for expansion and contraction. Couplings and fittings that are bolt-on, mechanical, or permasert will not be accepted. Socket, butt, saddle, and electrofusion, on the other hand, are all acceptable. There must be at least three wedge anchors on all riser brackets; no Hilti nails are allowed. Single-family homes have only one service line, which cannot be separated. A 14-gauge locate wire must be fitted with all gas lines. Any pipe that is placed must be free of scratches and in good working order. Until the meter is set, all risers must be secured and plugged. Before any work on a pipeline can be done, anyone welding or operating on high pressure must provide proof of Division of Pipeline Safety certification.
Bedding (B). If no conduit is used, every pipe must be buried with at least three inches of sand and shaded for at least six inches.
The minimum distance is C. The following is the minimum distance for structures and amenities to be placed near main transmission lines:
1. As used in this paragraph C:
c “The minimum distance entails:
iii. It refers to an area one foot vertically and three horizontally from the outer surface of a main or transmission line for any underground facility.
e “The concept of underground facilities is defined in Section 54-8a-2 of the Utah Code Annotated 1953.
2.a. A building or structure needing slab support or footings, as well as an underground facility, may not be constructed within the minimum distance of a main or transmission line after April 30, 1995.
b. This section’s subsection (C)(2)(a) does not apply if:
i. The structure or building is used for public or railroad transportation, natural gas pipeline purposes, or by a public utility subject to the Public Services Commission’s jurisdiction or regulation.
ii. The building or structure must be within a certain distance of the pipeline in order to get natural gas service.
iii. The owner or operator of the main transmission line has been contacted and given written authorization prior to installation or placement, as required by Section 54-8a-4, Utah Code Annotated 1953.
iv. The commission exempts such conduct from the provisions of this section’s subsection (C)(2)(a) by rule.
v. An owner or operator of a main transmission line may seek a mandatory injunction against anyone who violates subsection (C)(2) of this section in the district court of the judicial district where the main transmission line is located.
Violations of this section are not subject to the penalties set out in Title 54, Chapter 7, Utah Code Annotated 1953, Hearing, Practice, and Procedure, and Section 54-13-6, Utah Code Annotated 1953.
D. Tape for marking. All polyethylene lines must have locator wire and warning tape affixed.
E. Trenches must be backfilled according to EMMC Chapter 15.30. All mains must have a minimum of 30 inches of cover, while services must have a minimum of 30 inches of cover to the back of the easement, followed by 24 inches. A minimum of 48 inches of cover is required for high-pressure lines. All trenches must be compacted to a maximum of 95% in the highway and 90% out of the roadway. On mains, compaction tests are required. All trenches must be restored to their former state. Any damages to the site during excavation are the responsibility of the contractor. As per the inspection, all gas services and mains must be shaded with washed cyclone sand or equivalent. Three inches of sand must be under the pipe, and 12 inches of cover must be over the pipe. The gas riser must be buried with sand up to the red line on the riser. The pipe must be shaded the same day it is installed in the trench. You have ten days if the pipe needs to be left open for a tie-in.
Fusion (F). All polyethylene lines must be linked using a heat fusion method using Eagle Mountain City-approved employees.
G. Evaluation. For every 100 feet of pipe, it must be tested at 100 psi with a median of air or nitrogen for at least 15 minutes. For example, a 98-foot test takes 15 minutes; a 101-foot test takes 30 minutes, and so on. Regardless of length, the minimum test time is 15 minutes. Soap testing is required for any fittings that cannot be checked by air.
H. The manufacturer’s recommendations and applicable portions of ASME B31.8, 49 CFR Part 192, and AGA-01 must be followed when installing the gas distribution system, including all equipment. Pipe cutting must be carried out without causing harm to the pipe. Unless otherwise specified, all cutting must be done using a mechanical cutter that has been approved. Wherever possible, wheel cutters should be used. A gas-cutting and beveling machine approved for steel pipe six inches and greater may be utilized. Plastic pipe must be cut in accordance with AGA-01.
I. When the valve is operated, the valve installation in plastic pipe must be designed to protect the pipe from excessive torsional or shearing loads, as well as any other stresses that may be exerted by the valve or valve box.
Installing pipe underground.
A. Gas mains and service lines must be graded according to the chart. Except if otherwise permitted for valve installation, steel pipe joints must be welded. The mains must have a minimum cover of 48 inches and be installed on firmly compacted chosen material for the whole length. Where roads are to be cut, a minimum of 48 inches of future grade cover must be maintained. As stated in ASME B31.8, the main shall be enclosed, bridged, or built to bear any anticipated external loads. Standard weight black steel tubing with a protective coating as specified shall be used as the encasement material. Insulating spacers should be used to separate the pipe from the casing, and casing bushings should be used to seal the ends. It is not permissible to create a trench below the pipe on blocks to produce a uniform grade. Before being dropped into the trench, the pipe must be clean on the inside and kept free of water, soil, and other foreign debris that could harm or impede the valves, regulators, meters, or other equipment. Open ends of pipe or fittings must be firmly secured with expanding plugs or other suitable means when work is not in progress. When permitted, minor adjustments in pipe line or gradient that can be achieved through the natural flexibility of the pipe material without causing permanent deformation or overstressing joints can be made. Line or gradient changes that exceed the prescribed limits must be made using the fittings indicated. When installing polyethylene piping underground, foil-backed magnetic tape must be placed above the pipe to allow for magnetic detector detection. Within 12 hours of the inspection, the trench must be backfilled to 12 inches over the pipe with compacted bank sand and then tested. During installation, any exposed ends must be immediately capped. To finalize grade, the remaining backfill will be selected dirt compacted in eight-inch layers.
B. According to 49 CFR 192.327, the gas pipe in rocky areas must have a minimum cover of 24 inches. If there is rock in the trench, the contractor will be obliged to excavate it. All sections that will be covered by the 24-inch cover must be approved by the engineer.
C. Excavation under pond areas must be done according to the drawing instructions.