Wessington's Wellmite series of tanks are classified as T75 UN Portable tanks under the rules of ADR and IMDG. Wellmites are designed, manufactured and tested for storing and transporting liquid nitrogen by road, sea and from supply vessel to offshore platform.
The Wellmite consists of a cryogenic tank and associated pipe work and valves protected by a robust frame manufactured and certified to meet the requirements of DNV 2.7-1 and EN12079. Handling is by either forklift pockets or by slings attached to the frame pad eyes.
The tank has been designed for use in all areas of onshore & offshore operation where there is a limitation on floor space and a restriction in crane lifting capacity.
The tanks can be produced with working pressures of 60 psig through to 250 psig. ASME versions available.
The Wellmite also features high vacuum super-iunsulation, full set of decals (including logo's where provided by the customer), pressure build system and various pipe work options for maximum versatility.
Custom painting on special request.
Special Features :-
4 Bar ASME
|Pressure||6 Bar||4 Bar||6 Barg||17 Bar|
|Tare Weight Kg||1500||2850||2850||3200 Nominal|
|Maximum Gross Weight (LN2) Kg||3000||6000||6000||6000|
|Holding Time Days *||10||12||15||20|
|Inner Shell||Stainless Steel|
|Outer Jacket||Carbon Steel|
|Skid / Frame||Carbon Steel|
|Pipe Work||Tp.316 Stainless Steel Sch.10|
Shot Blast SA 2.5, Zinc Rich Primer 50 Microns. Epoxy High Build 125 Microns. Polyurentane Top Coat 50 Microns.
Standard Colour : White.
Custom Paint Specification On Request
|Design Approval(s)**||EN 13530, ADR/RID, IMDG, IMO, UKDOT, DNV-2.7-1, EN12079, Optional ASME U/CFR Stamped At Lower Pressures On Request|
|Performance||Maximum Evaporation Rate 0.5% per day|
|Temperature||Inner Shell -196°C to +50°C, Outer Shell -20°C to +50°C|
|Corner Castings||Not applicable|
|Couplings||NIT150 As Standard. Customer Specific Couplings On Request|
|Roof Plates||Aluminium (Durbar on request)|
|Drip Tray||Stainless Steel|
|Earth Point||Stainless Steel M12 Boss|
|Vaporiser||Stainless Steel Finned Tubing|
|Slings (Optional)||Slings & shackles (where supplied) - approved to all relevant codes including DNV 2.7-1|
|Insulation||Vacuum + Superinsulation|
* Holding times as calculated to EN 12213
** Design approvals may vary depending on options and Country of operation. For details, please contact Technical Department
|V1||Liquid Isolation Valve|
|V2||Liquid Top Fill Valve|
|V4||Gas Vent Valve|
|V6||Pressure Build Valve|
|V7||DP Gauge Low Pressure Line|
|V8||DP Gauge High Pressure Line|
|V9||DP Gauge Equalising Valve|
|V10||Liquid Decant / Fill Valve|
|V11||Line Blow Down Valve|
|V12||Line Blow Down Valve|
|V13||Secondary Trycock Valve|
|VC||Vacuum Pumping Port|
|DP||Differential Pressure Contents Gauge|
|C1||NIT150 As Standard. Customer specification on request|
|C2||NIT150 As Standard. Customer specification on request|
|RV1||Primary Relief Valve|
|RV2||Primary Relief Valve|
|RV3||Line Relief Valve|
|RV4||Road Relief Valve|
|NRV1||Non Return Valve|
|NRV2||Non Return Valve|
Tank schematic shows standard configuration, utilising Herose Globe Valves.
Option 1: Rear Fill direct to rear of tank allowing concurrent bottom fill/liquid decant (Wellmite 1000 only)
Option 2: Rear Fill external to tank via main Tank Isolation Valve (Wellmite 1000 only)
Option 3: Any of the above arrangements with Meca Inox Cryogenic Ball Valves as alternative to Herose Globe Valves