Wellman

Mandals Wellman is made from extruded thermoplastic polyether based polyurethane (TPU) with excellent wear & tear properties. The reinforcement is made from circular woven filament polyester yarn. The “extrusion through the weave” production method gives a very strong bonding between cover and lining as well as firmly encapsulating the woven polyester.

The hose has the following potable water certifications:

  • WRAS approved to BS 6920UK
  • KTW-DVGW approval, Germany
  • W270 approval, Germany
  • NSF 61 listing, USA

Mandals Wellman is an important part of a system where also the coupling is central, and can be supplied by Mandals. The hose is meant for use in a borehole with a submersible pump mounted at the end of the hose (we can direct you to pump suppliers if needed). The very high tensile strength of the hose makes this possible. Also, the incorporated strap with loops at the outside of the hose facilitates the strapping of the electrical cables for the pump to the hose.

The main advantages of the Wellman system is:

  • Easier to handle than rigid pipes of steel/HPDE or similar
  • Simple installation and retrieval
  • Very good hydraulic characteristics – less friction and more flow due to diameter swell.
  • Low risk of damage to cables and pump
  • No corrosion
  • Simple maintenance

Mandals Wellman can operate in a temperature range from -40°C to +50°C and can withstand intermittent use up to + 80°C. Below 30°C the recommended operating pH range is: pH 4-9. From 30°C to 50°C it is: pH 5-9.  Under recommended operation the maximum length extension is 2 % and the maximum diameter swell is 15 %. Mandals Wellman has a very good resistance to ozone, UV, fungus and hydrolysis.

Standard lengths up to 200 meters, and longer lengths can be made on request.

Technical Data

Inner Diameter Wall Thickness Weight * Burst Pressure Max. Well Depth Tensile strength Max. Total End Load **
inch mm inch mm lbs/ft kg/m psi bar ft m x1000 lbs tons lbs kg
2 51,0 +2,0 0,12 3,0 0,39 0,59 870 60 820 250 13,3 6,0 3 750 1 700
3 76,0 +2,0 0,13 3,2 0,62 0,93 870 60 820 250 24,4 11,0 6 600 3 000
4 102,0 +2,5 0,14 3,6 0,94 1,40 870 60 820 250 40,0 18,0 12 100 5 500
5 127,0 +2,5 0,16 4,0 1,30 1,94 870 60 820 250 48,9 22,0 15 900 7 200
6 152,0 +3,0 0,16 4,0 1,61 2,4 870 60 820 250 62,2 28,0 19 850 9 000

 

To obtain maximum lifetime of the hose, it is recommended that the Working Pressure does not exceed 30 bar / 435 psi at the submerged pump head.
* Dry hose without any attachments.  ** Including weight of water, pump, power cable, couplings, attachments etc.