Fiberglass Pipe Design - Manual of Water Supply Practices, by American Water Works Association

By American Water Works Association

Fiberglass pipe has had huge attractiveness in potable water offer, as a result of its corrosion resistance, very good energy to weight ratio, dimensional balance, and occasional upkeep. This guide offers water offer engineers and operators a convenient unmarried resource for the entire info they wish approximately fiberglass pipe and fittings. It covers layout, specification, buy, install and upkeep, transport, handing, garage, becoming a member of, and hydraulics.

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Sophisticated fluid transient computer programs are also available t o analyze pressure surge in complex multibranch piping systems under a variety of conditions. 8 DESIGN EXAMPLES Example 4-1: Use of the Hazen-Williams equation. Compute the frictional pressure loss in a Compute the frictional pressure loss in a 450-m long, 250-mm diameter fiberglass 1,500-R long, 10-in. diameter fiberglass pipe transporting 130 Wsec of water. pipe transporting 2,000 gpm of water. (C = 150 as typical) (C = 150 as typical) Step 1.

0 Where: h = depth of cover, in. 0 (5-11) Where: h = depth of cover, m L1= ti + LLDF (h) L1= ti + LLDF (h) (5-12) Where: Where: tl = length of tire footprint = 10 in. 0 for all other backfills If h I hirlt Lp = tw + LLDF (h) Where: t, = width of tire footprint = 20 in. If h > hint L2 = [t, + 72 in. 83 m (5-14) + LLDF (h)1/2 Where: Where: hint = depth at which load from wheels hint = depth at which load from wheels interacts interacts hint = (72 in. 83 m - t,)/LLDF Copyright (C) 2005 American Water Works Association All Rights Reserved (5-15) 56 FIBERGLASS PIPE DESIGN Calculation notes: 1.

Hydrostatic design basis, HDB. The long-term hydrostatic hoop strength of a specific fiberglass pipe material a s determined by tests and detailed evaluation procedures in accordance with ANSIIAWWA Standard C950, pressure classes subsection on long-term hydrostatic design pressure. Design factor, FS. A specific number greater than 1used to reduce a specific mechanical or physical property in order to establish a design value for use in calculations. 2 Symbols Bd = trench width at pipe springline, in.

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