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Big Nifty Pipe Guide

John Breen

Structural Steel Dimensions [PDF]

American Extruded Products

<<Cross-sectional dimensions (Imperial and Metric) for I-Beams, C-Channels, Angles and Tees. This PDF page is based on ASTM A-276, AMS-QQ-S-763, ASTM A-479 and DuPont SW 300M.>>

The Problem with Piping "Lift-off"

CAEPIPE

<<Contemporary commercial piping analysis programs deal differently with the problem of apparent lift-off of an operating pipe at a rod hanger or a one-way vertical support, such as a pipe on a support rack. A few programs provide error messages; others show a vertical movement with a possible increase in sustained (weight) stress (see NOTE below for CAEPIPE). A proper understanding of the standard piping design practice is the key to correct interpretation of these results from different programs. Such standard piping design practice was generally understood when the sustained and flexibility analysis rules were introduced in the 1955 Edition of the ASME B31 Code for Pressure Piping.>>

Pipe Support Installation and Maintenance Guide

Piping Technology & Products, Inc.

<<Variable Spring Hangers, Big Ton Springs, Constant Spring Hangers, Vibration Control and Sway Brace, Snubbers, Slide Plates, Expansion Joints, Pre-insulated Pipe Supports.>>

Pipe Guides

Flexicraft

<<Proper pipe guiding is essential to an installation of expansion joints or pipe loops. When properly applied, the guides will prevent the pipe from buckling and are required to ensure the manufacturer's warranty.>>

Seismic Design and Retrofit of Piping Systems [PDF File]

American Lifelines Alliance

<<The guide addresses the seismic design of piping systems or the retrofit of existing piping systems. The purpose of seismic design or retrofit is to assure that in case of earthquake, the piping system will perform its intended function: position retention (the pipe would not fall), leak tightness (the pipe would not leak), or operability (the piping system would deliver and regulate flow).>>

Piping Support Technical Information

Flexhose.com

<<This is the type of information I expect from online companies that provide products and services. Very good, this is a great example of "value added".>>

Polyurethane Components for Pipe Supports

Piping Technology and Products

<<The combination of strength to support loads and thermal insulation made rigid polyurethane foam an attractive material for the cryogenic pipe supports required for major LNG facilities constructed in the 1970's.>>

Pipe Guide Positioning (Bellows Joints)

The Metraflex Company

<<Proper guiding jof a pipe is essential if axial bellows units are to function correctly. Pipe guides help ensure proper application of movement to the expansion device and prevent bowing or buckling of the pipeline.>>

Mason Seismic Restraint Guidelines for Suspended Piping, Ductwork and Electrical Systems (Similar to Below)

Mason Industries, Inc.

<<All suspended piping, ductwork, conduit and cable trays (modify to meet scope of engineer's responsibility) shall be provided with seismic sway braces in accordance with the Mason Industries Seismic Restraint Guidelines for Suspended Piping, Ductwork and Electrical Systems and the applicable codes (modify to include all applicable codes). Seismic sway braces shall consist of galvanized steel aircraft cables or steel angles/channels. Steel aircraft cables shall be prestretched to establish a certified minimum modulus of elasticity. Cables braces shall be designed to resist seismic tension loads and steel braces shall be designed to resist both tension and compression loads with a minimum safety factor of 2. Brace end connections shall be steel assemblies that swivel to the final installation angle. Do not mix cable and steel braces to brace the same system. Steel angles, when required, shall be clamped to the threaded hanger rods at the seismic sway brace locations utilizing a minimum of two ductile iron clamps. The bracing system shall have an Anchorage Preapproval "R" Number from OSHPD in the State of California verifying its capability to resist seismic forces. Cable brace assemblies shall be Type SCB, steel brace assemblies shall be Type SSB, rod clamps shall be Type SRC, pipe clevis braces shall be Type CCB and multiple anchor load distribution brackets shall be type SLDB all as manufactured by Mason Industries, Inc.>>

Seismic Restraint of Suspended Piping

Mason Industries, Inc.

<<Suspended piping can move through large displacements in a seismic event and damage surrounding building elements. All seismic codes contain provisions for bracing suspended piping for the purpose of life safety. Seismic bracing of piping is not an option and is not left to the judgement of architects, engineers, contractors, owners, or suppliers. It has been observed that the pipe itself is very ductile and can withstand a great deal of bending and shaking, however, piping connections to equipment can be easily damaged in earthquakes.>>

Piping Vibration

CMCP Application Notes

<<Piping vibration can be an annoying problem which can consume unnecessary maintenance activity and can affect pumping system performance and endurance. The system includes the pipe, all piping supports, hangers, snubbers, pipe to pipe interfaces, and machinery or devices attached to the pipe. All these items can influence the pipe vibration patterns. This testing method will determine the piping system vibration amplitudes, frequencies, nodal points, and the pipe modal shape. It can, also, be used to identify defective supports, incorrectly placed supports, and the locations of maximum deflection requiring additional supports.>>

Expansion Joints, Pipe Support Catalog, Technical Bulletins

Piping Technology and Products, Inc.

Inexpensive Insulated Plastic Pipe Support

I.H.P., Inc.

Cold Service Insulation Pipe Supports

Extol of Ohio

<<Insulated pipe supports are required for piping in cold service. These supports are load bearing and therefore require a high density insulation with a higher compressive strength than the standard pipeline insulation. It has been common practice to use a rigid, high density product such as wood blocks or calcium silicate as an insulation pipe support material on mechanical pipe systems due to its superior strength. In reality a cellular, moisture resistant material may perform much more reliably than a calcium silicate product when used as an insulation pipe support on systems which operate at a temperature below +250F. The problem is condensation (water); in insulation. Condensation may occur on pipe lines which operate below the dew point temperature; below approximately + 62 F to +75 F allowing moisture to penetrate the system. Calcium silicate is hygro-scopic by nature and will actually absorb moisture (humidity) from the air if exposed. In fact, most major manufacturers of calcium silicate indicate on their data sheets that the service temperature range of the product begins at +250 F. (NOTE: At +250 F the temperature of the pipe is above boiling water and insures that any moisture in the calcium silicate will be steamed, or evaporated through the insulation and away from the pipe; thus helping to reduce the possibility of corrosion under insulation.)>>


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