GEOFLEX fittings

• Mainly water supply pipelines
• Anti-seismic protection of pipelines
• Protection of pipelines against landslides, subsidence of loose or unstable ground
• Stress caused by earthquakes, seismic earth movements, tsunamis, tidal waves, etc.
• PN16 bar

• EPDM elastomeric gaskets
• External and internal coating : Blue Epoxy Powder 250µm (PECB)
• Bolts & nuts: stainless steel grade 304
• Performances comply with ISO 16134 standard
• Type test (in part, where relevant) compliant with EN 545 standard

GEOFLEX® fittings (see G on sketch) can be installed on Natural (see T on sketch), Classic or Integral pipes ranges via the use of spigot-flanged fittings and flanged socket fittings (see B on sketch).

The design of the fitting’s central part (sleeve), sliding inside the ball-joint flanges at each extremity, allows contraction and expansion movements.

The overall sliding capacity (expansion/contraction) varies from 100 mm (+/- 50mm) up to 600 mm (+ 350mm/-250mm). A table recaps all these values DN per DN.

GEOFLEX®: a wide choice, ranging from DN100 up to DN1800, PN16. The selection of a GEOFLEX® fitting for a given DN, depends on the expected subsidence magnitude, which it may have to withstand.

This subsidence is evaluated & assessed depending of geotechnics or seismic stresses, and on the nature of grounds met during the project design.

The selection of the right GEOFLEX® fitting is the responsibility of the consultant, once considered the geotechnics parameters of the project.

Several possible deflection values (h) , ranging from 100 mm up to 600 mm and various deviation angles from +/- 30° up to +/- 38°, address DN by DN the foreseeable stress levels.

Between the 2 flanged extremities, the sliding central part (sleeve) of a GEOFLEX® fitting allows axial compression & expansion, varying from 100 mm (+/- 50mm) up to 600 mm (+ 350mm/-250mm), depending on the DN. A table recaps all values related to each DN.

(*) The overall sliding (contraction/expansion) range depends on the length of the central part (sleeve) of the GEOFLEX® fitting. The lo value mentioned is the sum of both contraction and expansion movements, expressed as +/-.

(**) DN100- Expansion / Contraction: +80 mm/ -20 mm in case of a 600 mm deflection (h).

(***) The maximum resistance to dismounting must be equal or superior to 3Xn (in mm) n expressed in kN. This resistance value is based on ISO 16134 standard: ‘’Earthquake and subsidence-resistant design of ductile iron pipelines‘’.

Example: for a DN150 GEOFLEX fitting, the maximum guaranteed value of resistance to dismounting is calculated as follows: R dismounting = 3 x 1500 = 4500 kN

GEOFLEX® fittings are individually packed on pallets, which are then shrink-wrapped (transparent plastic film).

The 2 extremities of GEOFLEX® fittings are fitted with PE protective caps. GEOFLEX® fittings feature 4 threaded retaining rods (see installation sheet), aiming:

• To prevent any axial unexpected sliding movement during transport & handling
• To keep the overall distance (between flanges) identical to the factory-settings, until the fitting assembly and the overall pipeline installation is hydraulically tested & approved

Each fitting is fitted with 2 PE sleeve and 2 securing wires, which will be installed on each pipeline extremity, prior to the installation of the GEOFLEX® fitting. See installation sheet.