Light and flexible polyurethane layflat hose with drinking water approval, designed as a permanent alternative to traditional materials in water wells with electric submersible pumps, manufactured in Norway to exacting standards.
ADVANTAGES
Rapid installation and retrieval of pump
- Lengths available up to 300m (depending on size)
- Joints only needed at pump and headwork
- Easier handling in restricted work areas
- Cost efficient installation and operation
- Low maintenance
- No corrosion and no scale build up
- Resistant to hydrocarbons, chemicals, ozone, UV
- Resistance to microbial attack, no clogging
- High abrasion resistance
- Minimised equipment damage risk
- Long lifetime expectancy
Superior hydraulic properties
- Slight diameter swell (up to 15%)
- Reduced friction loss, improved flow rates
- Stainless steel easy to mount couplings
Easy storage, packing and transportation
- Lightweight, flexible and easy to handle
- Transportation by smaller vehicles
- Less manpower needed
- Easier access to remote locations
Quality control
Mandals hoses are manufactured to the highest standards and quality control procedures and are warranted to be free from defects in workmanship and materials.International drinking water certification
UK: WRAS approval to BS6920
USA: NSF61 listed
Germany: KTW-DVGW approved, W270 approved
Typical applications, permanent or temporary
Ground water abstraction
Beach wells in desalination plants
Dewatering (mines, flooding, etc)
Environmental monitoring
Land stabilisation
Leachate removal in landfill sites
Offshore rig fire water etc
A complete system
The complete well riser main system consists of the Wellman hose, with special couplings, a submersible pump and power cables.
| INNER DIAMETER OF HOSE | OUTER DIAMETER OF COUPLING | PART No. | WEIGHT PER COUPLING |
|---|---|---|---|
| 2″/51mm | 106mm | WHC51 | 3.60kg |
| 3″/76mm | 133mm | WHC76 | 6.75kg |
| 4″/102mm | 164mm | WHC102 | 10.70kg |
| 6″/154mm* | 200mm | WHC152 | 8.00kg |
*The 6” coupling is a different design.
AISI 316 Stainless Steel Couplings
The potable water approved Wellman couplings are especially developed by Mandals to ensure easy installation and secure operation in the long term. They can be reused as needed and help ensure that the hose is coupled properly every time.
Hose Construction
Mandals Wellman is manufactured using “through the weave” technology, where the thermoplastic polyether based polyurethane (TPU) lining and cover are formed in a single extrusion process to provide a tough composite riser with excellent wear and tear properties.
The textile reinforcement is designed to support the weight of the submersible pump, the column of water, the power cable and the riser itself, with a minimum 2:1 safety factor. Additionally, torque on pump start-up is accommodated without damage to the riser.
The preattached and strong loops allow for easy attachment of the power cables for the submersible pump.
Technical Data Mandals Wellman
| INNER DIAMETER | WALL THICKNESS | PART No. | WEIGHT* | BURST PRESSURE | MAX. WELL DEPTH | MAX. CONTINUOUS END LOAD** | ||
|---|---|---|---|---|---|---|---|---|
| INCH | MM | MM | KG/M | PSI | BAR | M | KG | |
| 2 | 51+2.0 | 3.1 | WELMAN51 | 0.57 | 870 | 60 | 250 | 1,700 |
| 3 | 76+2.0 | 3.1 | WELMAN76 | 0.91 | 870 | 60 | 250 | 3,000 |
| 4 | 102+2.5 | 3.7 | WELMAN102 | 1.50 | 870 | 60 | 250 | 5,500 |
| 5 | 127+2.5 | 3.7 | WELMAN127 | 1.88 | 870 | 60 | 250 | 7,200 |
| 6 | 152+3.0 | 4.0 | WELMAN152 | 2.30 | 870 | 60 | 250 | 9,700 |
To obtain maximum lifetime for the hose, it is recommended that actual 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, coupling, attachments, etc.
