6-26-0171 Pipe Burst Specifications.pdf

26-0171 Purchase of Pipe Burst Equipment

Scope of Work

1. GENERAL REQUIREMENTS

1.1 Purpose

The City seeks to procure one (1) static pipe bursting rig and associated tooling designed for trenchless pipeline replacement applications. The system shall be capable of replacing existing pipelines using static pipe bursting methods, including upsizing from 16-inch host pipe to 20-inch DIPS HDPE DR11 PE4710 over typical runs of approximately 400 feet in cohesive clay soils at shallow installation depths (approximately 8 feet).

The equipment provided shall be a complete, fully integrated static pulling system capable of generating sufficient constant tensile force to fracture or split the host pipe while simultaneously installing the replacement pipe. The system shall be delivered fully assembled, tested, and ready for operation.

The intent of this procurement is to obtain equipment capable of performing trenchless pipe replacement work in municipal water and wastewater infrastructure with minimal surface disruption.

1.2 Minimum Performance Requirements

Proposers shall provide equipment meeting or exceeding the following minimum performance requirements:

A. Pullback Capacity The pulling system shall provide a minimum continuous rated pullback capacity of 200 U.S. short tons (400,000 pounds or approximately 1,780 kN). The system shall be designed to accommodate pipe bursting forces associated with moderate upsizing in cohesive clay soils for runs up to approximately 500 feet.

B. Pipe Diameter Range The equipment shall be capable of bursting or splitting host pipes ranging from approximately 8 inches through 20 inches in diameter, or a broader range, and installing replacement pipe up to 20-inch DIPS HDPE or larger.

C. Upsizing Capability The system shall support moderate upsizing applications, generally defined as a single nominal pipe size increase or up to approximately 25–30 percent increase in diameter, through the use of compatible bursting heads, splitting heads, and expander cones.

D. Soil and Pipe Compatibility The equipment shall be suitable for use in common municipal pipe bursting applications involving fracturable or splittable host pipes including, but not limited to:

• Vitrified clay pipe

• Reinforced or non-reinforced concrete pipe

• Cast iron pipe

• Asbestos cement pipe (ACP)

• Ductile iron pipe

• PVC pipe

• HDPE pipe

Where applicable, the system shall include pipe splitting capability designed to reduce debris generation and minimize required pulling force.

E. Run Length Capability The system shall demonstrate proven capability to perform pipe bursting runs of 400 to 500 feet or greater, assuming appropriate rod management and site conditions.

2. EQUIPMENT SPECIFICATIONS

2.1 Pulling Rig and Hydraulic Power Unit

The Contractor shall provide a horizontal static hydraulic pulling system meeting the following minimum specifications:

A. Equipment Type A horizontal static hydraulic pulling rig, preferably utilizing a rod-based system for precise control during pipe bursting operations.

B. Pullback Capacity Minimum 200 U.S. short tons continuous rated pullback force.

C. Pulling Speed Variable pulling speed with low-speed control for monitoring pipe bursting progress and higher speed capability for rod payout or repositioning.

D. Power Source Diesel engine compliant with applicable EPA Tier 4 emissions standards. Equipment designed for operation in urban environments is preferred, including noise-reduction features where feasible.

E. Hydraulic System The hydraulic system shall include:

• Pressure gauges

• Filtration system

• Cooling system

• Overload protection

F. Rod Handling Equipment (Preferred) Preference may be given to systems that include integrated rod handling features such as:

• On-board crane or lifting device for rod handling

• Integrated rod-spinner or automated rod connection system

G. Safety Features The system shall include standard safety features including:

• Emergency stop controls

• Programmable maximum pull force limits

• Automatic shutdown or overload protection to prevent over-pull conditions

H. Size and Transportability The system shall be designed for transport and deployment in municipal right-of-way environments. Compact designs that allow transport via trailer or standard equipment transport vehicles are preferred.

2.2 Bursting and Splitting Tooling

The Contractor shall provide a complete set of bursting and pipe splitting tools compatible with the pulling rig.

A. Bursting Head The system shall include cone-type, pyramid-type, or equivalent bursting heads suitable for fracturing existing host pipe materials.

B. Expander Cones Expander cones or equivalent devices shall be provided to facilitate upsizing. Cones should be sized appropriately relative to the outside diameter of the replacement pipe.

C. Splitting Capability The system shall include interchangeable splitting blades or pyramid heads suitable for splitting ductile iron, PVC, or HDPE host pipes where bursting alone is insufficient.

D. Materials Bursting and splitting tooling shall be constructed of hardened steel, carbide-reinforced steel, or equivalent durable materials suitable for use in abrasive or clay-based soils.

E. Connections Tooling shall be compatible with the pulling rod system and replacement pipe connections through threaded, quick-attach, or equivalent high-strength connection systems.

F. Tooling Range The proposer shall provide tooling compatible with pipe bursting operations within the following representative size ranges:

• 6-inch to 8-inch

• 8-inch to 8-inch

• 8-inch to 12-inch

• 12-inch to 12-inch

• 12-inch to 16-inch

• 16-inch to 16-inch

• 16-inch to 20-inch

• 20-inch to 20-inch

Replacement pipe utilized by the City will typically consist of 8-inch through 20-inch HDPE pipe

(PE4710, DR11).

2.3 Pulling Rod System

The Contractor shall provide a complete rod system designed to safely transmit pulling loads from the rig to the bursting head.

A. Material Rods shall be constructed of high-strength alloy steel designed for repeated high-load applications.

B. Load Capacity Rods shall be rated to safely accommodate loads associated with 200-ton pulling capacity systems.

C. Modular Length Rod sections shall be modular to allow assembly for pipe bursting runs of 550 feet or greater.

D. Handling Characteristics Rod sections should be designed for safe handling by operators and compatible with mechanical handling systems where provided.

E. Connections Rod connections shall be threaded, quick-coupled, or equivalent and designed to maintain high tensile strength throughout the pulling assembly.

3. QUALITY ASSURANCE AND WARRANTY

3.1 Equipment Condition

All equipment provided shall be new, unused, and from current production by the manufacturer.

Refurbished or previously used equipment will not be accepted unless specifically authorized by the City.

3.2 Manufacturer Certification

The manufacturer shall certify that the equipment meets or exceeds the minimum specifications identified in this solicitation.

3.3 Pull Force Monitoring

The pulling system shall include a pull force monitoring system capable of measuring and displaying applied pulling force. Documentation of calibration or manufacturer certification shall be provided.

4. DELIVERY AND ACCEPTANCE

4.1 Delivery Requirements

The Contractor shall deliver the equipment FOB destination to the City of Arlington, Texas, or another designated City facility.

Delivery shall include:

• Fully assembled equipment

• Operator’s manual

• Maintenance manuals and schedules

• Parts catalog

• Any required specialized tools

4.2 Inspection and Acceptance

Upon delivery, the City will conduct an inspection that may include:

• Visual inspection of equipment

• Verification of major system components

• Functional testing of the hydraulic system

• Verification of pull force monitoring capability

Equipment determined by the City to be non-conforming to the specifications may be rejected and returned at the supplier’s expense.

5. SUBMITTALS REQUIRED WITH PROPOSAL

Proposers shall submit the following documentation as part of their proposal:

• Manufacturer technical specifications and product literature.

• Documentation verifying rated pullback capacity.

• Description of the proposed bursting and splitting tooling.

• Equipment dimensions, weight, and transportation requirements.

• Hydraulic system description and power requirements.

• Warranty information.

• List of at least five similar projects involving pipe bursting in the 12-inch to 20-inch diameter range, including owner contact information.

• Description of service support and parts availability within the region.