OHIO VALLEY CONNECTOR PROJECT
H314
20” H-314 – TETCO Interconnect to TETCO Tap Site
Mechanical Scope of Work
Created by
EQT Pipeline Construction & Engineering
March 29, 2017
Revision 2
Table of Contents
Description / PageTable of Contents / 2
1. H-314 Pipeline Overview / 3
3. H-314 Pig Receiver (TETCO Taps) / 7
4. Tie-in Piping/End of H-314 Pipeline (TETCO Taps) / 7
Overview
The purpose of this document is to outline the mechanical scope of work for construction of the H-314 pipeline.
1. H-314 Pipeline Overview
H-314 is a 1,345’ 20” pipeline extending from Equitrans’ TETCO Interconnect at Plasma Compressor Station located in Monroe County, OH to TETCO’s Lines 25 & 30- 36” pipelines, located in Monroe County, Ohio. There will be a pig receiver installed at the end of the pipeline, adjacent to the TETCO taps for their pipelines. This Scope of Work covers the pipeline from the pig launcher at the TETCO Interconnect at Plasma Compressor Station fence line to the pig receiver. The receiver has been fabricated and is located at the EQT Waynesburg Warehouse facility.
Pipe Design
The line will be constructed of 20”, X65 steel ERW line pipe purchased in accordance with API 5L PSL2. The MAOP of the pipeline will be 1000 PSIG. The pipe wall will be 0.375” along its entire length.
The pipe lengths will be within the limits of API 5L – 30 ft minimum length, 36 ft average length, and 40 ft maximum length.
The pipe will be coated with Fusion Bonded Epoxy (FBE), with ARO over FBE being used as required by TETCO.
Controlled ID/Field Segmentable Elbows will be provided. The wall thickness of the ells will be 0.375”, and the ID tolerance will be 19.16” to 19.34”.
Fittings are available at the EQT Waynesburg Warehouse Facility. Pipe will be available for pickup from the Durabond facility in Duquesne, PA.
Crossing Over and Working On Over Existing Lines Crossing Existing Lines
Lines 25 and 30, both owned and operated by TETCO, must be crossed per TETCO’s specifications and guidelines. Crossings should be made at 90-degree angles to the pipeline, when at all possible. TETCO may require the use of TETCO-approved timber mats. During the use of timber mats, should there be movement of the mats that results in a reduction in cover or other soil movement
over the pipeline, it is anticipated that an additional layer of timber mats will be required running at 90 degrees to the first layer.
Crossing over Line H-314
When crossing the pipeline with a vehicle axle load of 20,000 pounds, at least 4 foot of cover is required and a maximum cover of 6 feet is allowed.
Cover Over New Line (H-314)
The maximum amount of permanent cover allowed over the new line is 8 feet, unless an exception is given by both EQT and TETCO Engineering. When requesting a variance, the wall thickness of the pipe and the proposed depth of cover must be provided.
Testing
The pipeline must be tested in one test segment.
Segment / From / To / Total Footage / Volume - gallons1 / TETCO
Interconnect
@ Plasma CS (MP 0.0) / Pig Receiver (TETCO
Taps) (MP 0.25) / 1,345 / 20,335
Total / = / 1,345 / 20,335
The pipeline will be tested for a minimum of 8 hours, with a minimum test pressure of 1500 psig at the highest point.
After a successful test of the pipeline is completed, EQT Pipeline Design Engineering and Compliance Departments must accept the test record prior to any dewatering operations. After the pipeline is cleaned, the valve settings and the pig receiver will be installed, and the final drying may take place.
Contractor shall be responsible to provide municipal water for pressure test. No other water source will be accepted. All water disposal will be the responsibility of the contractor through appropriate disposal means. No ground surface disposal will be permitted.
Pipeline Dimensional Verification
Contractor will utilize a high-resolution geometry inspection tool (caliper pig) to verify the dimensional and bore integrity of the pipeline after the hydrostatic test is complete and all MLV’s have been installed.
The pig speed shall be maintained within the limits set by the tool manufacturer at 4 to 6 miles/hour. Backpressure shall be monitored and adjusted to control the speed of the tool by throttling at the outlet end of the section. Any speed excursion that adversely affects the integrity of the data recorded may result in a required re-inspection.
The contractor shall be responsible for locating, marking and excavating the anomalies that are required to be inspected.
EQT shall inspect the pipe and determine the disposition on the anomaly. In general, any defect (of any type including dents and ovality) exceeding 2% of the pipe diameter will be repaired by cutting out the damaged portion as a cylinder.
The contractor shall be responsible for any cut-outs required, and for backfilling and reclamation.
Caliper pig specification and qualified vendors are noted below:
Caliper (Geometry) Pig SpecificationsOvality Measurement / to 1% Nominal Pipe OD
Dent Depth Measurement / to 1% Nominal Pipe OD or 0.1 inch whichever is less
Bend Angle Measurement / +/ - 5 degrees
Feature Orientation / +/ - 15 degrees
Bend Radius Measurement / 1.5 D to 30 D
Linear Location / +/ - 6-inches
Minimum Bore Capability / 75% Pipe OD
Velocity Range / 0.1 to 7 mph or better
EQT Approved Vendors:
1) Enduro, Steve Kump, Pass, Inc. Office 419-462-8833
Cell 330-283-1556
2) Rosen, Jeff Harris Office 281-925-0209 Cell 713-825-6620
3) TDW, Thomas Kerr, Kerr Engineered Sales Office 800-245-3198
Cell 412-860-8525
Cleaning and Drying
The pipeline shall be cleaned prior to installing the valve settings, launcher and receiver. The pipeline will be cleaned in accordance with the Contractor-supplied H- 314 cleaning and drying plan, to a dew point of -40 deg F. Nitrogen shall be used to expedite the drying process. The contractor will be required to submit the cleaning and drying plan to EQT Design Engineering for approval prior to conducting any testing operations.
Test Stations
Test Stations shall be installed in accordance with the alignment sheets and the Cathodic Protection Plan as supplied by EQT.
Line Markers
Line markers shall be installed within line sight of each other, and no further than 400’ apart.
Page 7 of 7
2. H-314 Pig Receiver (TETCO Taps)
The piping in this area will consist of the installation of a 20” x 24” Receiver. Grading will be required per the EQT-supplied grading plan (Site Grading performed by others), although the contractor shall return the site to as good or better condition than before the start of construction.
Fencing & Grounding will be installed at this site by pipeline contractor. This facility will be built by Pipeline Construction, to TETCO’s specifications. A total of four pipe supports per drawing P-O-H314-300-01-1 are required at this location. Three of the pipe supports shall include structural steel angles to support equalization line. Per TETCO requirements, Shafer Rotary Vane-style actuators are required for each of the 2 - 20” valves at this pig receiver site with associated electrical scope.
Contractor shall form, reinforce, and pour (FRP) the RTU building foundation and set the building.
3. Tie-in Piping/End of H-314 Pipeline (TETCO Taps)
The piping downstream of the pig receiver will tie into the TETCO 20” taps into their 36” Lines 25 and 30. TETCO has installed piping to the edge of their Right-of-Way and come above grade with a blind flange. Pipeline Contractor will install 20” piping to this location and come above grade, installing a flange to make the final tie-in with TETCO. All work must be done to TETCO’s Design & Construction Standards.
4. Tie-in Piping/End of H-314 Pipeline (Plasma Launcher)
The piping upstream (approx.1,345 L.F.) of the pig receiver will tie into the H-314 Launcher at the Plasma Compressor Station. Pipeline Contractor shall run 20” H-314 to a tie in point designated by the H-314 Launcher/TETCO Interconnect Contractor. Field coordination between contractors for this work shall be required.
Page 7 of 7