DESIGN CONSIDERATIONS FOR PEXGOL FITTINGS

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  • Use only fittings approved by Pexgol and listed in the Engineering Guide.
  • Service limitations (as relevant) for each type of fitting are specified in the Engineering Guide. When designing Pexgol pipes and fittings, the designer can consider the flexibility of the Pexgol pipes and elbows. In order to reduce the number of fixpoints, electrofusion and mechanical fittings should be regarded as rigid items.
  • Special care should be exercised in order to prevent excessive bending moment from being exerted on the fittings due to forced installation.
  • Use special fixpoint clamps before and after the fittings where required (see “Non-restrained fittings”).
  • Drawings of the fittings are supplied on request.
  • For further questions, please consult Golan’s application engineers.
PE-Xa Pexgol Elbows
  • PE-Xa elbows are available in pipe classes 15 to 30 with diameters up to 710 mm.
  • The standard bending radius of the elbows is approximately R = 3D or R = 1.5D for 45º or 90º elbows.
  • The working pressures and temperatures are the same as the Pexgol pipe SDR from which the elbow is made.
  • Order elbows with plain ends for either flange coupler or electrofusion fittings.
    Elbows with flared ends with or without flanges are available.
  • Flared end connectors can be used throughout the entire range of allowable working temperatures and pressures.
  • Elbows are supplied with fixture elements in order to maintain the required angle.
PE-Xa Spigot Reducers
  • Pexgol spigot reducers of all sizes and all pipe classes are available on request (see page 118 for more details).
  • The working pressures and temperatures are the same as for the Pexgol pipe class.
  • The Pexgol reducers are supplied with flared ends, with or without flanges.
Pexgol Spacers and Special Reducers
  • Pexgol spacers of all sizes are available on request.
Pexgol Instrument Tees
  • Pexgol instrument tees of all sizes are available on request.
  • The inlet is made of 316 stainless steel. Other corrosive resistant metals can be specified.
PE-X Lined Steel Fittings
  • PE-X lined steel fittings can be used as a part of any Pexgol pipe system. Their working pressures and temperatures are compatible with working pressures and temperatures of the Pexgol pipes.
  • The PE-X lined steel fittings are available in nearly any size and shape; see product page for more details.
  • The minimum length of each fitting is indicated in the “Fittings Catalogue”. This length can be reduced after consulting Golan Plastic Products.
  • It is possible to order a non-standard fitting which is a combination of standard fittings, or a standard fitting with longer legs.
  • The maximum allowable length for any such fitting is 2200 mm x 2200 mm.
    PE-X lined steel fittings can be used in the following cases:

    • A fitting that is not available as an all-Pexgol fitting is required.
    • The all-Pexgol fitting is too long.
    • A special shape is required.
  • All the PE-X lined steel fittings can be connected to the flared ends of the Pexgol pipes without an additional gasket. Additional information can be found on page 62.
  • All the PE-X lined steel fittings must be fully supported when installed on pipe bridges.
Pexgol Pipes with Flared Ends
  • Pexgol pipes can be ordered in any length up to 11.5 metres (to fit into 40 ft. containers) with one or two flared ends.
  • Flared ends connect two Pexgol pipes or a Pexgol pipe to a fitting.
    The sections with flared ends are produced with a tolerance of +/- 10 mm in length.
    No additional gaskets are needed.
  • Tightening the flanges of the flared end connectors should be performed as the table in page 73. Simply tighten the bolts evenly around the flange until all bolts are tight.
    The flanges are supplied according to industrial standard ASA 150. Other flanges are available by special order.
  • A flared end connection can be used throughout the range of allowable working temperatures and pressures.
  • Pexgol elbows with flared ends are also available.
PE100 Electrofusion Fittings
  • PE100 couplers can be used up to 45° to 50°C. Regarding working pressures and temperature of PN16 and PN25 couplers, please refer to the recommendations of the approved manufacturers.
  • The PE100 electrofusion fittings must be protected in the following cases:
    Above ground installations in extremely low temperatures.
  • Underground installations without sand embedding.
Reinforced Electrofusion Couplers Series 1
  • Reinforced electrofusion couplers series 1 are used for the same pressure rating as Pexgol pipes SDR 6 up to 70°C.
Reinforced Electrofusion Couplers Series 2
  • Reinforced electrofusion couplers series 2 are used for the same pressure rating as Pexgol pipes SDR 6 up to 90°C.

Bolt Connectors
  • GP bolt connectors are self-restraint type fittings.
  • For full details, see “Fittings Catalogue”.
  • It is recommended to install brass fittings above the ground. If you must install them anyway, make sure they are protected from corrosion.
  • Do not connect brass fittings to steel or galvanized pipes or fittings.
GP Flange Coupler
  • Available from 63 mm (with 2” flange) to 710 mm (with 28” flange).
  • All couplers comply with ASA 150 flange standard and some of them comply with other international standards.
  • GP flange couplers are suitable for the full range of allowable working temperatures and pressures of Pexgol pipes.
  • In above ground applications, use special fixpoint clamps before and after the fittings
    In some cases, the ID of the Pexgol pipes might be reduced locally by the GP flange coupler.
Branch Saddles
  • Available for Pexgol pipes from 32 mm to 160 mm.
  • British Standard Pipe Tapered Threaded (BSPT) threaded outlets.
  • Suitable for the full temperature and pressure ranges of Pexgol pipes.
  • See “Installation Instruction for Saddles”.
Stainless Steel Saddles
  • Available for Pexgol pipes from from 110 mm to 630 mm.
  • Flanged or threaded outlets (internal thread).
  • Maximum outlet diameter: up to half of the pipe’s outer diameter.
  • The saddles are available with a special rubber coating over the flange and neck to protect from corrosive liquids to which stainless steel is not resistant.
  • Temperature up to 85 ºC and pressure up to 12 bar.
  • In above ground applications, use special fixpoint clamps before and after the fittings.
Victaulic Fittings
  • Are approved for use with Pexgol pipe from class 10 up to class 24. Sizes available 63 mm to 355 mm.
  • In above ground applications, use special fixpoint clamps before and after the fittings.
  • For class higher than 24 please contact Golan application Team.
  • Also available Bruno and Aquafast fittings.
Table 61.1: Flared-Ends that require fixpoints
Class
OD (mm) 8 10 12 15 19 24 30
32 X X
40 X X X X
50 X X X X
63 X X X X
75 X X X X X X X
90 X X X X X X X
110 X X X X
125 X X X X
140 X X X X
160 X X X X
180 X X X X
200
225
250
280
315
355
400
450
500
560
630
710
Table 62.1: Other Fittings
Fittings Not Required
Bolt Connectors X
GP Flange Couplers
Mechanical double connectors up to class 24 X
Electrofusion Couplers X
Reinforced Electrofusion Couplers series 1 and 2 up to 70ºC X
Reinforced Electr fusion Couplers series 2 above 70ºC
Victaulic Couplers
Table 62.2: Gasket use recommendation in Pexgol pipe systems
Pexgol Flared End GP Flanged Coupling PE-X Lined Steel Fitting Teflon Lined Steel Fitting PE-Xc Fitting Steel flange/Valve
Pexgol flared end NO NO YES YES YES NO
GP Flanged Coupling NO NO NO NO NO NO
PE-X Lined Steel Fitting YES NO YES YES YES YES
Teflon Lined Steel Fitting YES NO YES YES YES YES
PE-Xc Fitting YES NO YES YES YES YES
Steel Flange/Valve NO NO YES YES YES YES

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