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DET NORSKE VERITAS (DNV) is an autonomous and independent foundation whose goal is to protect life, property, and the environment at sea and on land. DNV undertakes classification, certification and other verification and consulting services related to the quality of ships, offshore equipment and facilities, and onshore industries worldwide, and conducts research related to these functions.
The DNV 2.7-1 certified offshore container is specifically designed for dynamic hoisting with eye pad devices and DNV certified slings fitted with shackles.
They are checked during the design phase, material procurement, production, and final loading and NDE testing. ​Not only are prototypes tested, but a specific number of units are randomly selected from each batch for testing at a rate five times the rate of ISO standard container testing.
The containers have a solid steel structure, including floors. They weigh almost twice as much as an ISO container of the same size, which is critical to their ability to maintain an upright position while being transported in rough seas. They must be equipped with DNV approved slings, stronger steel, stricter production specifications and have all the test documentation to prove their reliability in harsh offshore conditions.
 
Classification societies certify containers

• 1. Design evaluation: details of materials, cargo handling, container lifting and cargo tightening inside the cantainer.
• 2. Manufacturing process: certified inspectors authenticate and test raw materials to confirm that welder qualification, welding process and non-destructive carbon damage work meet the requirements
• 3. Test: Four-point lift, two-point lift, tilt test and drop test

Offshore containers should be inspected regularly every year. Regular inspections should be performed on the inside and outside of the container when it is empty. TLS has prepared tips for you to check including:

1. Inspection of signs and nameplates.
2.  Weld inspection of main structural members to confirm that there are no visible defects.
3.  Inspection of lifting lugs and lashing points for deformation, mechanical damage, or other dangerous defects.
4.  Inspect all structures for corrosion, deformation, mechanical damage, or other dangerous defects.
5. Check the condition of the container floor, including the bottom drainage facilities and drainage holes.
6.  Check for corrosion and mechanical damage inside the fork pockets (where applicable).
7. Check the door, frame, seal, hinge, door lock, etc., and confirm the opening and closing of the door.

To facilitate the loading and unloading of the cargo, the bottom of TLS offshore containers is usually designed with fork pockets, which are required as follows:
1. If provided, the fork pockets shall be arranged in the bottom structure with the top closed to penetrate the bottom and prevent the offshore container from overturning from the fork tine.
2. The net opening size of the fork pocket of the offshore container shall not be less than 200mm×90mm.
3. Considering the length, height, width, and rated weight of the offshore container, the position of the fork pocket should ensure the stability of the container when it is transported by the forklift. The fork pockets should be as far apart as possible, generally not less than 900 mm from the center, but not more than 2,050 mm.
4. The bottom plate of the fork pockets can be closed completely, but openings are recommended for maintenance and to reduce the risk of loose items being left in the fork pockets, thereby preventing items from falling during the lifting process. Where openings are provided, the size and position of the opening should be set to avoid jamming or being damaged by the tines The opening at the bottom of the fork pockets are not allowed at the bottom side rails, and the distance between the opening and the bottom side rails should not be less than 200mm.
5. The weakening of vertical shear strength of bottom side rails by fork pockets opening should be taken into account when calculating the bottom side rails strength. In general, a reinforcement plate should be attached to the top of the bottom side rail. The reinforcement plate should be in the same plane as the bottom side rails web. The reinforcement plate should be extended by at least 100mm at both ends. At this point, the weld between the reinforcement plate and the bottom side rail should be completely melted through.

Visual inspection and non-destructive testing are commonly used to inspect container welds. Magnetic particle inspection is one of the types of non-destructive testing. Magnetic particle inspection is a method of observing defects using magnetic powders as a display medium. After the ferromagnetic material workpiece is magnetized, as the existence of discontinuity, the magnetic field lines on the surface and near the surface of the workpiece are locally distorted to generate a leakage magnetic field, which adsorbs the magnetic powder applied on the surface of the workpiece and forms a visible magnetic field under suitable illumination，and the location, size, shape, and severity of the discontinuities are shown.

TLS normally uses black magnetic paste for flaw detection. This method has high sensitivity to detect small defects on the surface of the workpiece. The steps are:

1. Pour and spray the magnetic levitation over the workpiece to be examined, and the flow rate of the levitation should be slow to prevent the magnetic imprints from being washed away.
2. Use a fixed device. It is easy to operate and has high efficiency.
3. Demagnetization. Reduce residual magnetism in the inspected workpiece so that it can be processed or used normally.
4. After magnetic particle inspection, residual magnetic levitation on the surface is removed and dried.Our QAs are all certified through strict examinations.

TLS attaches great importance to the quality of products and will only deliver products to customers after confirming that the products meet the quality inspection standards.
​Any requirements about specialized shipping containers, please feel free to contact us.

Containers are no longer a traditional transport tool that can only be used to carry goods. More and more container types are known to us. In order to meet the needs of different container types, the correct selection of doors has also become an important step in the design process.
 
Before choosing, please answer the following questions：
What does this container need to be used for?
Do large-sized items need to be placed in the container?
Are containers used as offices or homes?
Do we need to go inside the container frequently?
 
5 Basic Types of Container Doors for Your Reference
1. Cargo door
"Original" doors for shipping containers. Usually installed at the end of the container. These heavy duty doors are weatherproof and very secure. They open outward, and the secure cam and locking system are robustly designed to deter theft and reduce the risk of damage from inclement weather and other environmental threats.
Applicable environment：Large objects need to be easily placed in the container
Features: Affordable, no modification or installation required.

2. Personnel door
Use in case of storing smaller items or as a laboratory, office, house etc. They are usually installed on the end face of the container and have good sealing performance. According to the different use environments, there are doors that meet the level of B30 and A60.
Applicable environment: It is frequently used for easy entry and exit of people, (movable office building, portable office station, laboratory shipping container)
Features: Easy to use, various styles and standards to choose from

The design of any container building should be tailored to the specific needs of each project.
Feel free to contact us ,we customize special containers as you need. ​

What are the common container structures？
Different containers usually have different shapes and structures due to different uses. Let's take a look at the common container structures.

• Dry Containers

The common dry box structure is often used to transport common cargo and is the most common type of container.

• Flat Rack Containers

The sides can be folded, which can accommodate oversized and overweight cargo or machinery, etc.

• Open Top Container

The top can be opened, allowing cargo to be loaded from the top of the container, mainly for placing oversized cargo

• Tunnel Container

Doors open at both ends for easy loading and unloading of items in the box

• Side Opening Container

Containers with open sides for easy loading and unloading

• Tank

The type of container used to transport liquid materials. Most of these containers are made of anti-corrosion materials

• Half Height Containers| Cutting Skip

The size is half the size of a normal dry container. Mainly used for coal, stone and other goods that need to be easily loaded and unloaded.

​In addition to containers used to transport goods, do you know what types of special containers there are?

• Reefer Container| Refrigerated Container

Containers with refrigerated and fresh-keeping functions for transporting or preserving food, medicines and other items.

• Positive Pressure Container

The pressure inside the container is greater than the pressure outside, which can be used in hazardous area/safe area

• Negative Pressure Container

The pressure inside the container is less than the pressure outside, which can be used in areas where the environment inside the container is not safe,but the outside environment is safe

• Energy Storage System (ESS)

An energy storage system, often referred to as an ESS, is a device or group of devices assembled together that can store energy to provide electricity at a later time. Battery ESS is the most common type of new installation

• Lab Container/Workshop Container

A movable office container that can be used in dangerous or safe areas, when the external environment is complex, the internal working environment can be guaranteed to be safe, stable and comfortable

• Accommodation Container

A container for personnel accommodation that is easy to transport and move

• Temporary shelter| Temporary refuge shelter (TR)

In case of external explosions, fire, gas leakage and other dangerous situations, the shelter can provide a safe and reliable refuge for refugees.

• Sewage Treatment Container

Integrated container sewage treatment system, treated sewage can meet the corresponding standards according to customer demand.​

Key words:
#Dry Containers  #Flat Rack Containers #Open Top Container #Tunnel Container #Side Opening Container #Tank  #Half Height Containers| Cutting Skip #Reefer Container #Refrigerated Container #Positive Pressure Container #Negative Pressure Container #Energy Storage System (#ESS) #Lab Container|Workshop Container #Accommodation Container #Temporary shelter #Temporary  #refuge shelter ( #TR) #Sewage Treatment Container

CPFG is divided into three working modes: manual mode, bypass mode and automatic mode. Turn the mode selector switch to the corresponding mode, at the same time, HMI face change will switch to the corresponding mode. The operation instructions of each mode are as follows:
 
Manual mode: only for emergency use, only the HMI "STOP" button/ESD signal/Cut-off signal can stop the output of safety power supply.
Bypass mode: Only can be used in safe area, make sure no dangerous gas and fire alarm start the safety power supply.
Auto mode: Can be used for normal use in dangerous area.

​Any requirements, please contact us directly:
E-mail: sales@tls-containers.com 
Hotline: +65-65637288; +65-31386967

The specially designed ultra-wide explosion-proof lab container|workshop container| Pressure container is about to be delivered. Our technicians are cooperating with various inspections from the end customer and SGS to ensure that the performance of the container meets customer standards and industry standards.
TLS provides DNV2.7-1 standard | explosion-proof | which can be used in hazardous areas (ZONE 0, ZONE 1, AND ZONE 2) | special containers that meet A60 fire rating, we provide the independent certification from DNV | BV | LR | ABS | SGS.

​Any requirements, please contact us directly:
E-mail: sales@tls-containers.com 
Hotline: +65-65637288; +65-31386967