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April 30 2014


All That You Need to Know About Metal Fabricated Pressure Vessels

Think of the balloon that sometimes bursts out with a noise while being blown at. We at once know that it bursts out as it fails to withstand the excess pressure. However, for obvious reasons we cannot expect the same out of metal fabricated pressure vessels that are used for numerous industrial applications in factories, plants and manufacturing sites. There are several factors that need to be known in order to know about pressure vessels and how they operate under various conditions.

What are Pressure Vessels?

These metal-made closed containers are known for their highly precise and critical construction that renders them the capacity to contain gases and fluids (which may or may not be toxic/harmful) at a pressure that is much higher than the ambient pressure. Metal fabricated pressure vessels are widely used in almost every production or manufacturing unit that requires transferring, containing, or disposing harmful fluids, solids, semi-solids and gaseous elements. Pressure vessels are designed to perform the assigned tasks with ultimate safety, security, and protection. There are several applications that require operating under cryogenic atmosphere and pressure vessels are used for all those purposes.

What is the Engineering Technology that is used for fabricating Pressure Vessels?

It is important to pay the highest level of attention to the engineering technology used for fabrication of metallic pressure vessels as even the slightest of loopholes in construction can lead to fatal accidents. Reliable manufacturing companies that are involved in the designing of metal fabricated pressure vessels pay maximum attention to this aspect. Hence, there is a rising emphasis on official certificates ensuring safety and security factors. Holding pressurized substances, pressure vessels are meant to possess higher tensile and mechanical strength to avoid any kind of leakage and explosion. In this context, metal fabricated pressure vessels are of much importance. These are ideally constructed of stainless steel. Steel being highly malleable, versatile and durable; it is typically used for the fabrication purpose of pressure vessels as varied fabrication techniques can be used on the metal. Three different types of engineering technologies that are used for metal fabricated pressure vessels are welding, work hardening, and machining.

What are the Typical Industrial Applications of Metal Fabricated Pressure Vessels?

A wide gamut of industrial as well as commercial and domestic applications is carried out with the help of metallic pressure vessels and hence the usage can be found in the following industrial applications:
  • Industrial compressed air receivers
  • Domestic hot water storage tanks
  • Diving cylinders
  • Recompression chambers
  • Distillation towers
  • Pressure reactors
  • Autoclaves
  • Oil refinery and mining operations
  • Petrochemical plants
  • Nuclear reactor vessels
  • Submarine and spaceship habitats
  • Hydraulic reservoirs
  • Pneumatic reservoirs
  • Rail vehicle airbrake reservoirs
  • Storage vessels for liquefied gases like ammonia, chlorine and the cabin pressurization loads.
Importance of choosing an expert pressure vessel fabricator

Any metal fabricated pressure vessel needs to fulfill industrial requirements such as utmost quality-assurance and flawless endurance levels. Hence, it becomes the most crucial factor to choose an expert metal fabricator for the same. Following are the aspects that should be considered while selecting the company that manufactures metal-fabricated pressure vessels:
  • The selected firm should be an American Society of Mechanical Engineers (ASME) code certified company.
  • The firm should hold critical stamps like U, U2, U3, S and PP that cater to the customized as well as standard requirements of the clients.
  • It is also advisable for the firm to hold the National Board R-Repair Stamp, as this will enable you to engage the services of the same firm for future maintenance and repair
  • For repair and maintenance requirement, it is suggested to select the original manufacturer of metal fabricated pressure vessels.
Remember that pressure vessels and manufacturing the same involves a lot of risk factors and hence companies manufacturing metal fabricated pressure vessels are expected to employ the highest level of efficiency and latest testing capabilities.

February 12 2014


The Ultimate Source for Outstanding Solutions in Metal Fabrication and Manufacturing

BEPeterson (BEP) has been a leader in heavy gauge metal fabrication and welding since 1935. We at BEP specialize in providing innovative solutions for metal components and equipment manufacturing.

Industrial fabrication and product manufacturing is our forté. BEPeterson is a reputed for providing high volume manufacturing contracts and impeccable services in custom metal fabrication.

We provide complete manufacturing solutions for:
  • Pressure Vessel & Tanks
  • ASME Pressure Vessels
  • ASME Tanks
  • ASME Vacuum Furnaces
  • Pressure Filter Vessels
  • Filter Housings
  • Vacuum Chambers
  • Skid Assemblies
  • Co-gen Ducting
  • Low-NOx Burners

Our 90,000 sq ft facility gives us the capability to handle an entire project from concept to completion. At BEP, we work with the client to provide the most optimum solutions in terms of design, engineering, manufacturing, and inspection. We also provide overall project management services.

We use the latest in advanced design software and cutting-edge manufacturing machinery in our processes. . We source the best materials and provide them to our clients at feasible rates. BEP also offers FaroArm coordinate measuring machines for highly precise inspection of 3D designs, dimensional analysis, and CAD comparisons.

BEPeterson has been awarded 9001:2008 certification, and is a certified ASME Pressure Vessel manufacturer.

Our goal is to satisfy our client’s needs of high quality components at reasonable prices.

January 27 2014


What are the Safety Parameters Followed by Pressure Vessel Manufacturers

Safety has always been a huge priority where pressure vessels are concerned. The use of poorly designed and manufactured pressure vessels has resulted in the deaths of millions of men and women over the years. To reduce the staggering number of fatalities, pressure vessel manufactures are required to adhere to the standards and guidelines laid down by Government bodies.

API and OSHA Regulations

While there are a variety of codes and standards regarding various types of vessels, the most well-known guidelines that companies adhere to are:

  • API 572 for inspection
  • ASME Boiler and Pressure Vessel Code
  • API 510 Vessel Code for maintenance, alteration, and repair
  • OSHA 1915 Subpart K for vessels, drums, and containers
Safety Parameters for Pressure Vessels

While standards, codes, and regulations are essential for the industry, it is also the responsibility of pressure vessel manufacturers to use certain safety parameters for the manufacturing process. All manufacturers know that corrosion is the biggest factor for the weakening of the pressure vessel. For this reason, manufacturers place immense importance on the type of construction materials, the welding processes, and testing procedures, when it comes to designing and producing pressure vessels.

  • Materials: Pressure vessel safety concerns begin right from choosing the raw materials. If the raw materials are not of proper grade, then the pressure vessel cannot be considered fit for use. For the fabrication process, manufacturers use only high grade stainless steel and alloy materials including Hastelloy, aluminum, nickel, and carbon steel. Nuts and bolts of particular sizes and specifications are chosen to provide the metal further strength. A few manufacturers also provide skid assemblies for better safety in industrial applications.

  • Welding: All manufacturers are required to follow welding guidelines laid down by ASME in Section 9 of Pressure Vessel Safety. Manufacturers formulate a welding procedure that adheres to the standards of Section 9. They employ pressure welders who have passed the ASME P1-F3 qualification test. Welders are required to stamp the work using a symbol provided by the manufacturer.

  • Testing: The testing process is a pivotal stage as this will ascertain whether a pressure vessel is ready for delivery and use. The process begins with testing the mechanical strength and thickness of the steel plates. The quality of the welding joints is tested by conducting Non Destructive Examinations (NDE) using ultrasonic devices, magnetic particle tests, and even radiography.

The final test that is used to determine whether the vessel can withstand the required industrial pressures is the hydrostatic test. The vessel is completely filled with water and is pressurized 1.5 times the maximum allowable working pressure. If the vessel maintains the pressure for at least an hour, then it is ready for use.

All these processes ensure that pressure vessels sent for industrial applications meet the safety requirements, and will work under extreme conditions.

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BEPeterson recently completed five large stainless steel tanks.  The tanks were fabricated with a 2205 Duplex SS liner and 316 SS exterior frame.
 Metal Fabrication Specialists - Full Service Metal Fabrication Since 1935
— BEPeterson
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