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ISO Tank Container

ISO Tank Container
DNV 2.7-1 Offshore Container is a standard for offshore transport containers developed by Det Norske Veritas (DNV), and its full name is DNVGL-ST-E271 (formerly DNV 2.7 - 1). This standard aims to regulate the design, manufacturing, inspection and certification requirements of containers used to transport goods, equipment and personnel in the offshore oil and gas industry, ensuring their safety, reliability and applicability in harsh offshore environments.
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PRODUCT DESCRIPTION

DNV 2.7-1 Offshore Container is a standard for offshore transport containers developed by Det Norske Veritas (DNV), and its full name is DNVGL-ST-E271 (formerly DNV 2.7 - 1). This standard aims to regulate the design, manufacturing, inspection and certification requirements of containers used to transport goods, equipment and personnel in the offshore oil and gas industry, ensuring their safety, reliability and applicability in harsh offshore environments.


Winner Offshore containers are designed to offshore containers standards DNV-ST-E271 (DNV 2.7-1) and are certified by the authorities such as Det Norske Veritas (DNV) or  Lloyd’s Register (LR) or Bureau Veritas (BV).


Product Parameters

Tank Type

20' lSO full frame collar tank, Type UN Portable Tank Tl, insulated, steam heated, top side rails fitted

Frame Dimensions

20'x 8'x 8'6”

Capacity

21,000 Litres (+ /-1%)

24,000 Litres (+/-1%)

25,000 Litres (+ /-1%)

26,000 Litres (+0 /-1%)

.G.W.

36,000 kg

Tare (est.)

3,550 kg +/-3%

3,650 kg +/-3%

3,750 kg +/-3%

3,800 kg +/-3%

Max Payload

32,450 kg

32,350 kg

32,250 kg

32,200 kg

Design Pressure

4 Bar

Test Pressure

6 Bar

Max.Allowable Vacuum

0.41 Bar

Design Temp

-40°C to H30°C

Vessel Material

SANS 50028-7 WNr 1.4402/4404(C<0.03%),equivalent to 316L

Shell: Cold Rolled 2B finish

Ends: Hot rolled or Cold Rolled, polished internally to 1.2 Micron CLA

Shell Thickness

4.4 nominal

Ends Thickness (A.F)

4.5 mm nomina

4.6 mm nominal

Corrosion allowance

0.2mm

Frame Material

GB/T1591-0345D or SPA-H (or equivalent)

Frame to Shell

304 stainless steel

Corner castings

ISO 1161 - 8 off

Vessel Design code

ASME Vll Div.1 where applicable

Radiography

Shell

ASME Spot

Ends

ASME FuIl

Inspection Agency

LR or BV

Cargo carried

See dangerous cargo lists for UN Portable Tll tank

Stacking

Each container approved for 10 high stacking

Design Approvals

IMDG TI1, CFR 49, ADR/RID, CSC, TC, TIR, ISO, UIC, US DOT


FAQ
A:

DNV 2.7-1 and ISO 10855 are the two most widely recognized standards for offshore containers and lifting equipment.
> DNV 2.7-1 was developed specifically for offshore lifting operations in the oil and gas industry.
> ISO 10855 is an international standard that covers offshore containers and associated lifting sets.
> Many offshore operators require equipment to comply with both standards to ensure safety, reliability, and global acceptance.
Choosing equipment certified to these standards helps reduce operational risks and facilitates approval by offshore operators and inspection authorities.

A:

Yes. Certification documents can be provided according to project requirements.
Typical documents may include:
> DNV 2.7-1 Compliance Certificate
> Manufacturing Certificate
> Load Test Certificate
> Material Traceability Records
> Welding Procedure Specifications (WPS)
> Non-Destructive Testing (NDT) Reports
> Inspection and Test Plans (ITP)
All documentation is prepared to support offshore project approvals and customer quality assurance requirements.

A:

Offshore containers and cargo baskets are available in a wide range of payload capacities.
Common options include:
Equipment Type Typical Payload Range
Cargo Basket 2–15 Tons
Offshore Container 2–25 Tons
Offshore Tank Container Customized
Waste Skip 3–12 Tons
Custom payload capacities can also be designed to meet specific project requirements.
The final safe working load (SWL) depends on container dimensions, intended application, and certification requirements.

A:

Yes. Customization is one of the most requested services in offshore logistics projects.
Available customization options include:
> Custom dimensions
> Special lifting arrangements
> Offshore workshop containers
> Offshore accommodation modules
> Zone 2 pressurized containers
> Refrigerated containers
> Stainless steel construction
> Enhanced corrosion protection systems
> Customer branding and color schemes
Engineering teams can develop solutions based on operational requirements, transportation methods, and certification standards.

A:

The service life of offshore equipment depends on operating conditions, maintenance practices, and environmental exposure.
With proper maintenance, offshore containers can typically operate for 10–20 years or longer.
Factors affecting service life include:
> Marine corrosion exposure
> Frequency of lifting operations
> Inspection and maintenance schedules
> Coating and paint system quality
> Environmental conditions such as offshore wind, salt spray, and humidity
Regular inspections and recertification help ensure continued compliance, safety, and long-term performance.

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