When it comes to offshore containers used in the oil and gas industry, DNV2.7-1 is a widely recognized standard. However, selecting the right paint standard for these containers can be challenging. Two options to consider are C3 and C5 standards.
The C3 standard is suitable for containers used in general marine environments, with coatings having medium durability and anti-corrosion properties. The minimum paint thickness should be 75μm. On the other hand, the C5 standard is suitable for containers used in highly corrosive environments, with coatings having high durability and anti-corrosion properties. The minimum paint thickness should be 150μm.
It's important to consider the specific usage environment and requirements when selecting the paint standard for DNV2.7-1 compliant containers. For general marine environments, the C3 standard is typically sufficient. However, if the container will be exposed to highly corrosive environments, the C5 standard should be used.
Proper surface preparation, primer application, intermediate coats, and topcoat thickness are also crucial factors in ensuring the longevity and durability of the paint on DNV2.7-1 compliant containers.
In conclusion, choosing the right paint standard is essential to ensure the safety and longevity of DNV2.7-1 compliant containers. By understanding the differences between C3 and C5 standards and considering the specific usage environment, you can make an informed decision and select the appropriate standard for your container.
The C3 standard is suitable for containers used in general marine environments, with coatings having medium durability and anti-corrosion properties. The minimum paint thickness should be 75μm. On the other hand, the C5 standard is suitable for containers used in highly corrosive environments, with coatings having high durability and anti-corrosion properties. The minimum paint thickness should be 150μm.
It's important to consider the specific usage environment and requirements when selecting the paint standard for DNV2.7-1 compliant containers. For general marine environments, the C3 standard is typically sufficient. However, if the container will be exposed to highly corrosive environments, the C5 standard should be used.
Proper surface preparation, primer application, intermediate coats, and topcoat thickness are also crucial factors in ensuring the longevity and durability of the paint on DNV2.7-1 compliant containers.
In conclusion, choosing the right paint standard is essential to ensure the safety and longevity of DNV2.7-1 compliant containers. By understanding the differences between C3 and C5 standards and considering the specific usage environment, you can make an informed decision and select the appropriate standard for your container.
C5 PAINTING
As defined by the International Maritime Organization, an offshore container is a "portable unit specially designed for repeated use in the transport of goods or equipment between fixed and/or floating offshore installations and ships. Known in the offshore oil and gas community as "slippery rails "as they are often used to transport large assemblies to drilling and production rigs.
DNV's certification standards 2.7-1, 2 and 3 are a globally recognized set of certification standards for offshore containers and marine service modules. The certification standards relate to the certification of all types of marine containers as transport units. The three typical stages of transportation are: shore-based residency (eg, forklifts), supply vessels, and loading and unloading offshore facilities. The certification standards include design requirements related to all three phases.
There are five basic steps for DNV approval and certification:
1. Certification of our (or our client's designation) written welding procedures, laboratory tests and welder qualifications
2. Evaluate and approve our primary device/skid/frame designs
3. Audit/Survey during initial welding start-up
4. Production：Audits/investigations during equipment manufacturing
5. Prototype testing：For "type" approval (type approval means a series of identical units are manufactured over a period)
DNV's certification standards 2.7-1, 2 and 3 are a globally recognized set of certification standards for offshore containers and marine service modules. The certification standards relate to the certification of all types of marine containers as transport units. The three typical stages of transportation are: shore-based residency (eg, forklifts), supply vessels, and loading and unloading offshore facilities. The certification standards include design requirements related to all three phases.
There are five basic steps for DNV approval and certification:
1. Certification of our (or our client's designation) written welding procedures, laboratory tests and welder qualifications
2. Evaluate and approve our primary device/skid/frame designs
3. Audit/Survey during initial welding start-up
4. Production：Audits/investigations during equipment manufacturing
5. Prototype testing：For "type" approval (type approval means a series of identical units are manufactured over a period)
What is DNV certification?
DNV (Det Norske Veritas), a Norwegian classification society, merged with Germanischer Lloyd (GL) in September 2013 to form the world's largest classification society DNV GL Group.
As a classification society, DNV GL sets standards for the offshore, maritime, energy and oil and gas industries. The purpose of these standards is to provide users, operators and engineers with requirements, principles and acceptance criteria.
Two common standards are:
DNV2.7-1 and DNV2.7-3 in common
Difference between DNV2.7-1 and DNV2.7-3
Apart from the difference in standard details, the biggest difference is that the maximum gross weight (MGW) of dnV2.7-1 certified container is less than 25,000 kgs, and the MGW of DNV2.7-3 certified container is greater than 25,000 kgs.
Although DNV2.7-1 and DNV2.7-3 standards are set by DNV Classification Society, they are also recognized by other classification societies (BV, LRs, etc), which will issue corresponding certificates according to the same standards.
DNV (Det Norske Veritas), a Norwegian classification society, merged with Germanischer Lloyd (GL) in September 2013 to form the world's largest classification society DNV GL Group.
As a classification society, DNV GL sets standards for the offshore, maritime, energy and oil and gas industries. The purpose of these standards is to provide users, operators and engineers with requirements, principles and acceptance criteria.
Two common standards are:
- DNVGL-ST-E271, Offshore containers (2.7-1)
- DNVGL-ST-E273, Portable offshore containers (2.7-3)
DNV2.7-1 and DNV2.7-3 in common
- Both 2.7-1 and 2.7-3 are standards specify requirements and recommended practice covering transport of offshore containers and portable offshore containers.
- The standards cover the specific areas of design, manufacturing, testing, certification, and periodic inspection
- Both standards cover the lifting frames or containers and, in most cases, not the equipment contained within the frames
- Both standards cover the safe lifting and handling of offshore containers and installations between two floating vessels and between vessels and fixed or floating offshore installations.
Difference between DNV2.7-1 and DNV2.7-3
Apart from the difference in standard details, the biggest difference is that the maximum gross weight (MGW) of dnV2.7-1 certified container is less than 25,000 kgs, and the MGW of DNV2.7-3 certified container is greater than 25,000 kgs.
Although DNV2.7-1 and DNV2.7-3 standards are set by DNV Classification Society, they are also recognized by other classification societies (BV, LRs, etc), which will issue corresponding certificates according to the same standards.
