How to Make a Choice Between API 620 and 650 for Your Storage Tank?

Standards for the design, manufacture, and installation of riveted steel storage tanks for oil storage have been set by the American Petroleum Industry (API). API inspection companies refer to these standards when conducting tank inspection and assessment.

The 620 and 650 models are now the most prominent tanks on the market, but which is best for you?

What you need from the product will determine the response. Large steel low-pressure storage tanks, typically more significant than 300 feet in diameter, are subject to API 620 regulations for design and manufacture. API Standard 650, on the other hand, is frequently used in carbon, stainless steel, and aluminum tanks found in terminals, distilleries, pipelines, and other processing facilities. Stress and temperature factors are also varied for each. The storage tank model you choose will depend on your individual demands and/or your customers.

For those of you who work in the steel fabrication and tank inspection sector, this article should help to clarify the main distinctions between API Specifications 620 and 650 for holding tanks.

API 620 Standard

Because of its architectural arrangement, you need a raised or flat bottom to store API 620. The tank consists of a single, perpendicular, center point of revolution that is at least 3/16 inches thick in the material. Additional features of API 620 include:

  • It is made of aluminum alloys, nickel alloys, and carbon steel.
  • The American Society of Mechanical Engineers (ASME), Section 10, requires a welding qualification.
  • No outside entity is involved in the mandatory API inspection services.
  • The expense of the non-destructive examination is the inspection cost (NDE)

Features of API 620 include:

  • It is applied to items with high additional stress, such as cryogenic tanks and liquefied natural gas (LNG).
  • It can hold items at lower temperatures and greater pressures of gas or vapor storage).
  • Any liquid may be kept in it.

API 650 Standard 

API 650 establishes minimal specifications for the design, selection of materials, assembly, and testing of aboveground, open- and closed-top, cylindrical storage tanks of various capacities and dimensions, equivalent to atmospheric pressure. Higher inner tensions are permitted if extra conditions are satisfied. Only tanks that sustain the whole bottom uniformly and tanks used in non-refrigerated operation with a maximum allowable heat of 200 degrees Fahrenheit are covered by API 650. You must have material that is at least 3/16 inches thick. Other features of

API 650 include:

  • It comprises aluminum, austenitic duplex alloy steels, and carbon steel.
  • The ASME, Section 10, requires a welding certification.
  • No outside entity is involved in the mandatory inspection.
  • The price of the examination is the price of the NDE.

Some advantages of API 650 are:

  • Some of the most famous tanks in the oil business may contain biofuel, oil, gas, chemicals, water, and other liquids.
  • It can hold contents at a significantly greater heat (-40 ° F to 500 °F) than the requirements of API 620 but at reduced pressure (maximum 2 12 PSI).
  • Any tank size is acceptable.

Which one is the best?

In a nutshell, API 620 allows for storing items at more significant pressure and lower temperatures. In contrast, API 650 only allows for lower pressure and higher temperatures.

After understanding your precise temperature and humidity criteria, you can see that selecting your standard appropriately is essential.…

What are the various types of magnetic particle testing used in tank inspection?

The engineering and tank storage sector relies heavily on facility upkeep and maintenance.

This implies that tank facility administrators and operators must remain updated on the newest auditing requirements for all of their facilities’ parts, equipment, and procedures. 

But how can this be done without interfering with everyday operations or jeopardizing the equipment’s integrity? This is where worldwide inspection services companies come into play. 

Many facilities have embraced non-destructive testing methods because of their consistent and accurate results and the testing process’s reliability. This kind of testing causes no harm to the equipment’s elements, implying that frequent testing is more practical. Facility administrators can rest assured that their premises are up to standard and that their staff is safe.

Magnetic particle assessment, which is used to find faults on the top of magnetic objects, is a form of non-destructive testing (NDT).

Testing for Magnetic Particles

During magnetic particle screening, an object or substrate is evaluated for surface and subsurface faults. Magnetic particle testing is often used to assess ferromagnetic materials, including iron, nickel, and cobalt.

Inspection Method

The technique of magnetic particle testing is two-fold: first, magnetize the object, and then disseminate metal particles over it while the magnetic field is still active.

API 653 tank inspections inspectors must first magnetize a surface with a magnetic current before examining a magnetic particle. This will highlight any possible surface flaws.

Direct Magnetization 

An electric current is transmitted directly through the item or surface being investigated in direct magnetization. In the ferromagnetic item, this produces a direct magnetic field.

Indirect Magnetization 

Instead of putting an electric charge via the item, indirect magnetization produces a magnetic field from the outside.

When determining the proper magnetic flow for magnetic particle inspection, tank inspectors must consider the object’s geometry, the sorts of defects to be detected, the type of material, and how shallow the current must be for faults to be identified.

If there are no external faults, the magnetic charge will stay constant along the surface of an object; nevertheless, if even a minor surface defect is found, the magnetic flow will be disrupted, causing the magnetic energy to expand out from the site of fault, resulting in a flux leakage field.

Inspectors scatter magnetic nanoparticles over the defect to make it apparent to the naked eye once one flux leakage field has been produced. Any flaws in the surface will attract the particles.

Testing of Wet Magnetic Particles

The magnetic atoms are dispersed out while hanging in a liquid carrier in a wet magnetic particle examination.

 Wet magnetic particle testing is more effective than dry magnetic particle screening at spreading an even covering of magnetic granules over the field. More minor surface flaws are observable when smaller rupture fields occur on the object’s surface because liquid particles flow more smoothly for more extended periods.

Dry Magnetic Particles Assessment

In dry magnetic particle testing, dust particles are used to look for surface flaws. Minor subsurface faults on rough surfaces or subterranean welds are commonly detected using this method.

The current causes a pulse when the field is magnetic, allowing the dust granules to travel over the field. The extra powder is softly blown away while the electromagnetic current is still administered. The particles will collect over the surface imperfections, similar to wet magnetic particle analysis, making the faults more visible.…

Understanding the Different Types of Industrial Coatings

Different Types of Industrial Coatings & Their Applications

When it comes to the performance of industrial water tanks, storage tanks, and other industrial applications, industrial coatings play a crucial role. Industrial finishes and coatings are a form of paint chemically manufactured to preserve industrial objects, such as field-mounted pipes and tanks, against harsh weather elements and abrasion. Industrial paints are often used to coat water reservoirs and tanks indoors to prevent them from corrosion and create a safe condition to store drinking water. There are specialized water tank inspection services companies that perform coating inspections. 

Multiples layers of coatings, such as a layer of first, paint layer, and then sealant, may be required for applications. Industrial uses may also require coatings that, like in the case of many water stands and reservoirs, are protective and beautiful.

Different Types of Industrial Coatings

Many types of industrial coatings exist. Depending on the climate in which your storage container is installed, the sort of product that you will be keeping, and other considerations, the choice of the primer, coating, or sealant suited to your project may vary. However, one must remember that examining tank coating is also essential when getting a storage facility evaluated by a tank inspection services company. Your choice of industrial coating will determine the testing procedure and results. 

Let’s look into some types of  industrial coatings used in the metal fabrication industry.

100% Polyurethane Coatings

Industrial polyurethane coatings excellently withstand abrasion can protect storage containers from extreme weather conditions and abrasive wear and tear.

Tanks made of steel that are needed to be submerged in water are often coated with aromatic polyurethane paint. However, the paint is not usually used to line water storage tanks.

Epoxy Coatings

Epoxy coverings are resistant to corrosion, abrasion, and weathering, making them excellent for storage tanks that are kept in harsh conditions.

One can also utilize them in tanks that hold hot products or expose them to severe heat since they are resistive to extremely high temperatures. 

However, epoxies have one disadvantage. If epoxies are exposed to sunshine, they can degrade. Epoxies are therefore usually utilized for indoor and underwater applications.

In many cases, three coats of industrial epoxy coating are used. A prime, such as a zinc prime, is applied first. The epoxy is then sprinkled. The coating process is finalized using the epoxy binder or polyurethane topcoat.

Zinc-Rich Coatings

Zinc coatings offer a highly efficient polymer and galvanic barrier for steel components that need abrasion resistance.

This strong protective product consists of zinc dust utilized in the coating and the binders made of polyurethane or epoxy.

Acrylic Coatings

Due to their corrosion resistance and high-gloss qualities, acrylic industrial protective coats are most often employed in automotive and architectural applications. For other industrial uses like tanks, reservoirs, and penstocks, acrylic coatings are less prevalent.

Metalized Coatings

Metallization is the technique of smelting metal wire, atomizing, and spraying the melted material to the surface of an object to form a tough coating.

It may be made using bronze, aluminum, stainless steel, nickel, chrome, and zinc, as well as tungsten. Metallic components are usually covered with a seal to enhance their corrosion resistance ability. …