Section 15020 PIPE SUPPORTS

Section 15020

PIPE SUPPORTS

PART 1 - GENERAL

1.1 THE REQUIREMENT

A. The CONTRACTOR shall provide all tools, supplies, materials, equipment, and all labor necessary for the furnishing, construction, and installation of all pipe supports, hangers, guides, and anchors shown, specified, or required for a complete and operable piping system, in accordance with the requirements of the Contract Documents.

1.2 RELATED WORK SPECIFIED ELSEWHERE

A. The requirements of the following sections and divisions apply to the Work of this section. Other sections and divisions of the Specifications, not referenced below, shall also apply to the extent required for proper performance of this Work.

1. Section 01332, Seismic Design Data

2. Section 09800, Protective Coating

3. Section 15000, Piping, General

1.3 REFERENCE SPECIFICATIONS, CODES, AND STANDARDS

A. All Work specified herein shall conform to or exceed the applicable requirements of the referenced portions of the following publications to the extent that the provisions thereof are not in conflict with other provisions of these Specifications.

B. Comply with the applicable editions of the following codes, regulations and standards.

1. Codes and Regulations:

CCR California Code of Regulations, Title 24, Part 2, California Building Code (CBC)

CCR California Code of Regulations, Title 24, Part 4, California Mechanical Code

CCR California Code of Regulations, Title 24, Part 5, California Plumbing Code

2. Industry Standards:

ASME B31.1 Power Piping

ASTM A 123 Standard Specification for Zinc (Hot-Dip Galvanized) Coatings on Iron and Steel Products

AISC 325 Steel Construction Manual

AISI SG-973 Cold-Formed Steel Design Manual

C. Comply with the applicable reference Specifications as directed in the General

Requirements and Additional General Requirements.

1.4 CONTRACTOR SUBMITTALS

A. Shop Drawings: The CONTRACTOR shall furnish complete shop drawings of all pipe supports, hangers, anchors, braces and guides, as well as calculations signed and stamped by a California Registered Engineer. Contractor to provide details along with the details for all other supports for special supports and anchors, in accordance with General Requirements, Additional General Requirements and as specified herein.

1. The supports and details indicated on the drawings are provided for guidance only and to demonstrate the minimum requirements however, the contractor is responsible for the complete design of the pipe supports as a complete system including bracing for the entire system as required for seismic zone 4.

2. Submit certificates from components manufacturers certifying that the finishing is Hot-dip galvanized after fabrication. All components not hot-dip galvanized will be made of 316L stainless steel.

1.5 QUALITY ASSURANCE A. General:

1. Shop inspection may be provided by OCSD at its expense. Inspectors engaged by OCSD will make such inspections, may perform non-destructive testing, and may prepare test results at OCSD’s expense. Copies of test results will be provided to CONTRACTOR.

2. Shop inspection and non-destructive testing will be required for welded pipe supports and appurtenances which are modified from Manufacturer’s standards, are designed by CONTRACTOR, or are fabricated from ENGINEER designs indicated on the Contract Documents. CONTRACTOR shall request these inspections at least 48 hours in advance of welding.

PART 2 - PRODUCTS

2.1 GENERAL REQUIREMENTS

A. Code Compliance: All pipe supports shall comply with the following codes:

1. Title 24, Part 2, California Building Code.

2. Supports and mechanical joint restraints for plumbing piping shall comply with

Title 24, Part 5, California Plumbing Code.

3. Supports for Heating, Venting, and Air Conditioning shall comply with Title 24, Part 4, California Mechanical Code

4. All supports and parts thereof shall conform to the requirements of ASME B31.1 unless otherwise supplemented or modified by these Specifications.

B. Channel Supports:

1. Where called for on the Contract Documents, channel supports shall be used to support piping, trays, etc. These members shall be of the 1-5/8-channel width series, accurately and carefully rolled from mild strip steel. All fittings, accessories, nuts, bolts, and studs shall be as recommended by the manufacturer of the member. All inserts, support members, and brackets shall be hot-dip galvanized after cutting and/or fabrication. Clips, fasteners, and all other miscellaneous hardware shall be the most corrosion resistant available from the manufacturer in this order: stainless steel, hot-dip galvanized, electro-galvanized, etc. Where necessary to support the imposed load, members shall be of a stronger series than the minimum indicated below:

a. Concrete Inserts: Concrete inserts shall be stainless steel Unistrut Series P-

3200; Elcen "Speed Strut" Fig. 1150, Or Equal. Spacing of concrete wall inserts shall not exceed 4 feet.

b. Support Members: Support members shall Unistrut Series P-1000-H; Elcen "Speed Strut" Fig. 600-H8, Or Equal. Multiple members shall be installed where shown or where required to support loads.

c. Brackets: Brackets, unless otherwise specified, shall be specifically made for

Unistrut P-1000 series or Elcen Fig. 600 series, Or Equal.

C. Pipe Supports: For fastening pipes against walls or ceilings cadmium plated one- hole clamps, Carpenter-Paterson, Inc. Part No. 237; ANVIL International. Figure 126, Or Equal; may be used for pipe 2 inches and smaller. For pipe 2-1/2 inches and larger, galvanized short clips with four-bolt holes, Carpenter-Paterson, Inc. Part No. 114, or ANVIL International. Figure 262, Or Equal may be used, or the pipe may be supported by brackets. Brackets shall be Carpenter-Paterson, Inc. Part No. 69, 84 or 139; ANVIL International. Figure 194, 195 or 199, Or Equal; of proper size and type for load.

D. Hangers:

1. Pipe Hangers: Pipe hangers shall be capable of supporting the pipe in all conditions of operation. They shall allow for free expansion and contraction of the piping, and shall prevent excessive stress on equipment. All hangers shall have a means of vertical adjustment after erection. Hangers shall be designed so that they cannot become disengaged by any movement of the supported pipe. Hangers subject to shock, seismic disturbances, or thrust imposed by the actuation of safety valves, shall include hydraulic shock suppressors. All hanger rods shall be subject to tensile loading only.

2. Hangers Subject to Horizontal Movements: At hanger locations where lateral or axial movement is anticipated, suitable linkage shall be provided to permit such movement. Where horizontal pipe movement is greater than 1/2 inch, or where the hanger rod deflection from the vertical is greater than 4 degrees from the cold to the hot position of the pipe, the hanger rod and structural attachment shall be offset in such a manner that the rod is vertical in the hot position.

3. Spring-Type Hangers: Spring-type pipe hangers shall be provided for piping subject to vibration or vertical expansion and contraction, such as engine exhausts and similar piping. All spring-type hangers shall be sized to the manufacturer's printed recommendations and the loading conditions encountered. Variable spring supports shall be provided with means to limit misalignment, buckling, eccentric loading, or to prevent overstressing of the spring, and with means to indicate at all times the compression of the spring. The support shall be designed for a maximum variation in supporting effort of 25 percent for the total travel resulting from thermal movement.

4. Hangers, if not indicated on the Contract Documents, shall be Carpenter- Paterson, Inc., Part No. 100, ANVIL International., Figure 260, Or Equal; hot dip galvanized clevis hangers, with hot dip galvanized all-thread rod sized according to the hanger manufacturer’s recommendations and with galvanized malleable iron or cast iron concrete inserts; Carpenter-Paterson, Inc., Part No. 108; ANVIL International. Figures 282, 152, Or Equal.

5. Where it is not possible to cast inserts in the concrete, concrete anchors may be used

E. Thermal Expansion: Wherever expansion and contraction of piping is expected, a sufficient number of expansion loops or joints shall be provided, together with the necessary rolling or sliding supports, anchors, guides, pivots, and restraints. They shall permit the piping to expand and contract freely in directions away from the anchored points and shall be structurally suitable to withstand all loads imposed.

F. Heat Transmission: Supports, hangers, anchors, and guides shall be so designed and insulated, that excessive heat will not be transmitted to the structure or to other equipment.

G. Riser Supports:

1. Where practical, risers shall be supported on each floor with riser clamps and lugs, independent of the connected horizontal piping.

2. Galvanized riser clamps shall be Carpenter-Paterson, Inc., Part No. 126; ANVIL International, Figure 261, Or Equal.

H. Freestanding Piping: Free-standing pipe connections to equipment, like chemical feeders, pumps, etc., shall be firmly attached to fabricated galvanized steel frames made of angles, channels, or I-beams anchored to the structure.

I. Submerged Supports: All submerged piping and piping in an area contained above a liquid shall be supported with hangers, brackets, clips, or fabricated supports and anchors of Type 316 Stainless Steel.

J. Point Loads: All meters, valves, equipment, and other point loads shall be independently supported to prevent undue pipe stress and failure. No meter, valve, or other equipment shall be supported by the piping.

K. Noise Reduction: To reduce transmission of noise in piping systems, all copper tubes in buildings and structures shall be wrapped with a 2-inch-wide strip of rubber fabric or similar, suitable material, at each pipe support, bracket, clip, or hanger.

L. All anchor bolts installed as part of a pipe support system, regardless of location or application, shall be manufactured of Type 316 stainless steel.

M. Pipe supports for brass and copper pipe shall be copper plated, or insulators provided. Protection shall be in the form of a rubber insert between the pipe and the support.

N. Rubber hose and flexible tubing shall be provided with continuous angle or channel support.

O. Unless otherwise indicated on the Drawings, piping shall be supported 1-1/2 inches from the face of walls and at least 3 inches below ceilings.

P. Valves in plastic pipelines shall be secured and anchored so there will be no apparent movement in the valve body and pipe during normal operation of the valve.

2.2 MANUFACTURED SUPPORTS

A. Unless otherwise specified or indicated, pipe supports shall be fabricated of manufacturer's standard materials. All products used shall satisfy the requirements of the Contract Documents. A single manufacturer may not have all required products as standard products.

B. Manufacturers, Or Equal:

1. Unistrut.

2. Carpenter & Paterson, Inc.

3. Elcen Metal Products Company.

4. Anvil International.

2.3 COATING

A. Galvanizing: Unless specified to be fabricated of stainless steel, all fabricated pipe supports shall be blasted to a white clean condition after fabrication and hot-dip galvanized in accordance with ASTM A 123. Electroplate galvanized materials will not be accepted.

B. Other Coatings: Other than those supports specified to be manufactured of stainless steel, all manufactured pipe supports shall receive protective coatings in accordance with the requirements of Section 09800, Protective Coating. Protective coating shall be applied in addition to hot-dip galvanizing. Galvanizing is not to be considered as a protective coating.

C. The CONTRACTOR is responsible for requesting Shop Inspection of all hot-dip galvanizing of pipe supports.

PART 3 - EXECUTION

3.1 INSTALLATION

A. General: All pipe supports, hangers, brackets, anchors, guides, inserts and seismic bracing shall be fabricated per these Specifications and installed in accordance with the specified spacings and manufacturer's accepted submittals per ASME B31.1. All concrete inserts for pipe hangers and supports shall be coordinated with the formwork and installed per accepted drawings. Pipe supports shall not interfere with passage through facilities or with access to equipment.

B. Channel Supports: Channel supports shall be installed in all piping or electrical tunnels or galleries at not more than 5 feet on center on both walls. Where called for on the Contract Documents, supports shall be installed in tunnel ceiling at not more than 5 feet on center. In tunnels or galleries 10 feet or greater in width, supports shall be placed opposite each other on each wall. Where tunnel or galleries are less than 10 feet in width, supports shall be placed staggered opposite each other on each wall. Channel supports shall extend to within 3 inches of the top of walls. All embedded pipe supports shall be in place prior to placement of cast-in-place concrete.

C. Power actuated drive pins are not acceptable for installing pipe hangers.

D. Any pipe supports/hangers installed in existing concrete shall be anchored by the use of Type 316 Stainless Steel anchors.

E. Contact between dissimilar metals shall be prevented. Dissimilar metals shall be isolated by the use of approved coal tar epoxy, zinc chromate, or approved isolation pads.

F. All connect points for hanger rods shall be locked off using lock nuts or double nuts. G. Exposed piping shall be supported at the base of all risers, at intervals not to exceed

5 feet on all horizontal runs of pipe 2 inches and smaller, and at intervals not to exceed

10 feet on all horizontal runs of pipe larger than 2 inches. Plastic piping shall be supported at intervals not to exceed 5 feet.

H. Wire, straps, chains, or such shall not be used for piping supports. I. Expansion shields shall not be used for anchor bolts.

J. Concrete Supports: Where concrete supports are used under piping, the supports shall be placed 1 inch low. Then, not earlier than one day later, the piping shall be grouted in place with nonshrink grout. Steel supports shall be adjustable pipe supports on pipe standards with floor flanges as manufactured by Carpenter-Paterson, Inc., Part No. 101, ANVIL International, Figure 264, Or Equal. Nonshrink grout shall be used under the floor flanges to give level bearing, and floor flanges shall be bolted to the floor with bolts cast in the concrete, if possible, or using concrete anchors.

3.2 FABRICATION

A. Shop Inspection: Shop inspection shall be required for all welded pipe hangers and supports. It shall be the responsibility of the CONTRACTOR to request shop inspection as required.