33 05 09.33 - Thrust Restraint for Utility Piping.pdf

33 05 09.33 - THRUST RESTRAINT FOR UTILITY PIPING

Herbert, Rowland & Grubic, Inc. 33 05 09.33 - 1 007297.0444

SECTION 33 05 09.33 - THRUST RESTRAINT FOR UTILITY PIPING

PART 1 - GENERAL

1.1 SUMMARY

A. Section Includes:

1. Pipe joint restraints.

B. Related Requirements:

1. Section 31 23 16.13 - Trenching: Trenching and backfilling requirements for Site utilities.

2. Section 33 31 23 - Sanitary Sewerage Force Main Piping: Piping requirements.

1.2 REFERENCE STANDARDS

A. American Water Works Association:

1. AWWA C110 - Ductile-Iron and Gray-Iron Fittings.

2. AWWA C111 - Rubber-Gasket Joints for Ductile-Iron Pressure Pipe and Fittings.

3. AWWA C151 - Ductile-Iron Pipe, Centrifugally Cast.

4. AWWA C900 - Polyvinyl Chloride (PVC) Pressure Pipe and Fabricated Fittings, 4 In.

through 12 In. (100 mm through 300 mm), for Water Transmission and Distribution.

1.3 COORDINATION

A. Coordinate Work of this Section with installation of fittings and joints that require restraint.

1.4 SUBMITTALS

A. Section 01 33 00 - Submittal Procedures: Requirements for submittals.

B. Product Data: Submit manufacturer catalog information for restrained joint details and installation instructions.

C. Shop Drawings:

1. Indicate restrained joint details and materials being used.

2. Submit layout drawings showing piece numbers and locations.

3. Indicate restrained joint locations.

D. Manufacturer's Certificate: Certify that products meet or exceed specified requirements.

E. Delegated Design Submittals:

1. Submit signed and sealed Shop Drawings with design calculations and assumptions for restrained lengths.

2. Submit joint restraint details.

3. Use joint restraint devices specifically designed for applications described in manufacturer information.

Herbert, Rowland & Grubic, Inc. 33 05 09.33 - 2 007297.0444

F. Manufacturer Instructions: Submit detailed instructions on installation requirements, including storage and handling procedures.

G. Qualifications Statement:

1. Submit qualifications for manufacturer, fabricator, and licensed professional.

1.5 CLOSEOUT SUBMITTALS

A. Project Record Documents: Record actual locations of joint restraints.

1.6 QUALIFICATIONS

A. Manufacturer: Company specializing in manufacturing products specified in this Section with minimum three years' documented experience.

B. Fabricator: Company specializing in fabricating products specified in this Section with minimum three years' documented experience.

C. Licensed Professional: Professional Engineer experienced in design of specified Work and licensed in the Commonwealth of Pennsylvania.

1.7 DELIVERY, STORAGE, AND HANDLING

A. Section 01 61 00 - Product Requirements: Requirements for transporting, handling, storing, and protecting products.

B. Inspection: Accept materials on Site in manufacturer's original packaging and inspect for damage.

C. Store materials according to manufacturer instructions.

D. Protection:

1. Protect materials from moisture and dust by storing in clean, dry location remote from construction operations areas.

2. Provide additional protection according to manufacturer instructions.

1.8 EXISTING CONDITIONS

A. Field Measurements:

1. Verify field measurements prior to fabrication.

2. Indicate field measurements on Shop Drawings.

PART 2 - PRODUCTS

2.1 PERFORMANCE AND DESIGN CRITERIA

A. Provide pressure pipeline with restrained joints at each bend, tee, and change in direction.

Herbert, Rowland & Grubic, Inc. 33 05 09.33 - 3 007297.0444

2.2 RESTRAINED JOINTS

A. Mechanical Restrained Joints: Mechanical joint restraint consisting of follower gland which when actuated imparts multiple wedging action against the pipe, increasing its resistance as the pressure increases. ASTM A 536-80 ductile iron follower gland of dimensions such that it can be used with AWWA C153 mechanical joints. Restraining devices shall be made of ductile iron, heat treated to a minimum hardness of 370 BHN.

Twist-off nuts shall be used to insure proper actuating of the restraint device. Restraint device shall have a 250 psi minimum working pressure with 2:1 minimum safety factor.

Coating for restraint devices shall consist of the following:

1. All wedge assemblies and related parts shall be processed through a phosphate wash, rinse, and drying operation prior to coating application. The coating shall consist of a minimum of two coats of liquid fluoropolymer coating with heat cure to follow each coat.

2. All casting bodies shall be surface pretreated with a phosphate wash, rinse, and sealer before drying. The coating shall be electrostatically applied, and heat cured. The coating shall be a polyester based powder to provide corrosion, impact, and UV resistance.

B. Push-on Restrained Joints: Restrained joint bell joints and/or fittings shall consist of one of the following restraint systems:

1. Bolted retainer rings and welded retainer bars or boltless, push-on type which include ductile iron locking segments and rubber retainers. Bolts for restrained joints (if applicable) shall conform to ANSI B18.2. Restrained pipe and fittings shall be TR Flex as manufactured by US Pipe, Flex-Ring type joints as manufactured by American Cast Iron Pipe Co., Snap-Lok as manufactured by Griffin Pipe Products, Field Lok 350, as manufactured by US Pipe, or equal. For thrust restraint of field cut piping, the manufacturer’s standard assembly shall be used (if applicable).

Assemblies shall be TR Flex Gripper as manufactured by U.S. Pipe, Snap-Lok FC as manufactured by Griffin Pipe Products, Field Flex-Ring as manufactured by American Cast Iron Pipe Co., or equal.

2. Field-Lok Restrained Joint Gaskets as manufactured by US Pipe or equal, conforming to the requirements of ANSI A21.11 (AWWA C111).

C. Restraint Harness (PVC):

1. Restraint for PVC pipe bell (AWWA C900) shall consist of the following: The restraint shall be manufactured of ductile iron conforming to ASTM A536. The restraint devices shall be coated with a thermoset epoxy coating. A split serrated ring shall be used behind the pipe bell. A split serrated ring shall also be used to grip the pipe, and a sufficient number of bolts shall be used to connect the bell ring and the gripping ring. The combination shall have a minimum working pressure rated to the full pressure of the pipe. The restraint shall be manufactured by EBAA Iron, Inc., or approved equal.

Herbert, Rowland & Grubic, Inc. 33 05 09.33 - 4 007297.0444

PART 3 - EXECUTION

3.1 EXAMINATION

A. Section 01 73 00 - Execution Requirements: Requirements for installation examination.

B. Verify that pipe and fittings are ready to receive Work.

C. Field measure and verify conditions for installation of Work.

3.2 PREPARATION

A. Section 01 73 00 - Execution Requirements: Requirements for installation preparation.

B. Clean surfaces of pipe and fittings that are to receive tied joint restraint systems.

3.3 INSTALLATION

A. Install joint restraint system per manufacturer installation requirements, such that joints are mechanically locked together to prevent joint separation.

END OF SECTION