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How to Evaluate a Custom Pressure Vessel Manufacturing Partner

Accreditations 

Custom and pressure vessel manufacturers must have accreditation for ASME certification. Compliance with the National Board of Boiler and Pressure Vessel code is required. Pressure vessel manufacturers must also manufacture to ASME material specifications, certificates, and welding qualifications.

Other accreditations are also crucial in the pharmaceutical, life science, and health industries. Confirm all industry compliance standards, including:
•    ASME UM
•    ASME U
•    FDA
•    3-A
•    CRN
•    PED
•    BPE

Quality Assurance & Compliance

Verify that the manufacturer has a dedicated quality assurance team.  There are significant testing, certifications, and documentation requirements for all global accreditation programs. In-house inspection services are a benefit to ASME projects. Review services that should include:
•    Pneumatic testing
•    Hydrostatic testing
•    Liquid Penetrant (Dye Penetrant) testing
•    Saline testing and certificate
•    Riboflavin/CIP (clean-in-place) coverage test
•    Material Test Reports
•    Base metal thickness certificate
•    Material trace
•    Welder trace
•    Ferroxyl test and certificate
•    Positive material identification (PMI) and certificate
•    Ferrite levels and certificate
•    Radiography and analysis
•    UT weld testing and certificate
•    Turn Over Packet (TOP) as required


Experience

The pressure vessel manufacturer must have expertise in the type of vessel and industry experience for the use of the vessel. Critical staff, fabricators, and welders must be ASME certified. All welders must be approved for the weld procedures required to make custom pressure vessels.

Experience and reputation are also significant when developing relationships with inspectors, agencies, and governing officials to keep the compliance process moving forward smoothly.  

Service & Support

Above all, assess the service and support provided by the manufacturer. The vessel manufacturer should be able to articulate technical discussions and be open and honest with timelines, cost, and compliance-related issues. Consider other research and questions, such as:

•    Is the proposal easy to understand and compare solutions?
•    Do you have direct access to the engineer for questions?
•    Does the company provide timely and accurate documentation?
•    Does the company offer after-market parts and field service?

Download Small Vessel brochure
Download Large Tank brochure


How to Troubleshoot a Pressure Tank

There are several reasons why a vessel may need service, however, two main causes why a vessel may need service are either accident or performance related.

In the case of an accident, such as a tool falling into the tank and causing damage; surface scratches and dents can typically be repaired on-site, provided they do not go beyond minimum requirements, with mechanical polishing or hand/wand electropolishing. 

Reduced agitator performance or failure is often due to worn parts, improper assembly or a bent or broken shaft.  Agitator repairs may be addressed with the agitator manufacturer or the vessel manufacturer, depending on the situation, down-time, and severity of the failure.

When troubleshooting a drop in pressure in a tank or vessel, a typical cause is often related to seals. One sign of seal failure is product coming out of the seal.  To help reduce the frequency of an unexpected seal leak occurring, it is recommended to use a good seal maintenance program to solve a lot of pressure / performance issues, such as:
•    Seal replacement has been neglected
•    Flat spots on seals are a sign for replacement
•    Improper or incorrect seals for the outlet
•    Nicks, scratches or mishandling of seals

A best practice is to avoid product waste and critical down-time is to inventory seals for all outlets and manage seals in a preventative maintenance program.

It is important to note that any weld repairs to the ASME pressures zones on tanks, require an R-Stamp.  The R-Stamp is a certification required by the National Board of Boiler and Pressure Vessels for repair of an ASME tank or vessel.

Depending on the size of the vessel and type of repair, Apache’s service techs may be able to make repairs on site or in some cases, tanks are shipped back to the factory. Apache can provide services including:
•    Field service and troubleshooting to all types of stainless and high alloy tanks
•    ASME / National Board R-Stamp repair and modifications
•    Surface finish repairs
•    Non-code repairs and modifications including piping and heat transfer jackets
•    Seal and agitation repairs and modifications
•    Accessory repairs
•    Head and tank shell repairs
•    Leak detection
•    Audit and service contract available

Visit Small Vessels

Visit Large Tanks


General Use VS Custom Vessel: When It's Time to Consider a Custom ASME Pressure Vessel

Emerging life sciences, and health and wellness product manufacturers must carefully plan budget and start-up costs to launch their products. Many of these entrepreneurs begin production with a general use vessel.

A stainless general use vessel has a lower entry price. Depending on the process and the demand for the product, general-use vessels may serve a small manufacturer very well for many years. Dispensing and storage vessels, vacuum and low-pressure vessels are common examples of general use applications.

However, when demand outpaces production, the manufacturer may require a vessel that is customized for the processing needs. Here is a case story of a manufacturer that switched from a general use to a custom ASME pressure vessel:

BEFORE: A fast-growing botanical extraction processor was unable to produce the quantity of product needed to fulfill demand. Their process involved an imported general use vessel that was placed in a rudimentary ice bath for temperature control. This process resulted in waste of non-consistent product and constant staffing and manual intervention to monitor and adjust.

AFTER: Apache's small vessel team provided an ASME processing vessel that completely replaced their batch process. The new vessel was designed with a thermal heat jacket that heated and cooled the product to the exact temperature required for the extraction process. The ASME vessel was jacketed with tri-clamp ferrules and included a site glass and high-pressure sanitary fittings. The vessel has a pickle passivated finish that provides ease of sanitation between batches.

While the price point for a custom manufactured vessel was higher than a general use tank, the ability to quadruple production off-set the cost of the vessel and resulted in a quick return on investment. Apache's custom vessel runs continuously day and night; it eliminated product waste and removed employee monitoring and intervention.

Visit standard vessels or visit custom ASME vessels, for more information!


What is the Significance of Domestic and Foreign Stainless Steel for Original Commercial Equipment?

The steel material used in manufacturing commercial original equipment must fit the performance, pricing, delivery time, and quality requirements for the end-user. Industrial equipment suppliers, like Apache, must leverage relationships with mills and partnering suppliers to manage the constantly changing market. Part of the purchasing program for the stainless material program at Apache, focuses on partnering with quality domestic and foreign suppliers. 

Stainless sheet and plate are produced in the United States, which is the majority of Apache’s base material for tanks, vessels and food processing equipment. Also, most Hastelloy and other high-alloy performance metal materials are made in the US. Pipes and fittings on the other hand are primarily from foreign suppliers since domestically there is not enough availability for demand. 

Depending on the political climate, import tariffs affect the cost and availability of steel material from China and other countries. Some industries require products from foreign markets that may be a specific sheet, size, and material type, but those industries will pay a premium for it and may be subjected to extended delivery times. 

One of the benefits to being a significant user of stainless steel is the relationships with stainless producers and distributors. Apache’s steel venders allocate an allotment of material to Apache, which affords relatively short transactions for supply. When we have a line on repetitive need, we initiate inventory strategies to keep our supply as fluid as possible. Many other components and materials are affected by timing and supply; Apache understands lead times and availability and also leverages relationships to manage delivery to provide the best timing possible. 

Our suppliers understand our needs and hold a higher level of steel quality. The relationship and partnership with our steel vendors has strengthened our expectations, with some partnerships lasting up to 45 years when Apache was founded. 

Apache uses more than 2000 tons of stainless and high alloy per year. We are in the business of heavy gauge commercial manufacturing of custom equipment for high-compliance industries. Our ability to manage domestic and foreign material as well as price, timing and quality of all material and components is resolved for serving over 100 industries represented by our industrial and commercial processing customers.


What is the Difference Between an ASME U and a UM Stamp?

There are many industry specific certifications in vessel manufacturing that regulate the construction of a vessel. However, for many types of pressure vessels, ASME certification is required and may be in addition to other industry requirements due to the vessel's geometry and pressure designation. Any tank that meets the requirements of ASME Code Section VIII can be certified. This certification is frequently referred to as "stamped" because the code symbol is most commonly applied using a stamp process. Here are the main differences between ASME U and ASME UM symbols and certification.

ASME Certification with U Symbol

  • Any vessel meeting the requirement of ASME Section VIII can be marked with the U Symbol.
  • Most local and state laws require vessel designs 15 PSI and higher to be ASME Code Certified.
  • Qualified manufacturers receive a triennial joint review (audit) by their authorized inspection agency, and the National Board of Boiler and Pressure Vessel inspectors.
  • U vessels require an Authorized Inspector (3rd party ASME inspector) to review with approved calculations.
  • U vessels require an ASME pressure test with the Authorized Inspector residing over the test.
 

ASME UM Symbol

  • UM vessels are smaller in volume (less than 5 cubic feet)
  • UM qualified manufacturers receive an annual ASME review by their authorized inspection agency and are also subject to the same triennial joint review (audit) as mentioned above.
  • UM vessels have size specifications, including:
    •   5 cubic feet of volume or small with pressures not exceeding 250 PSI
    •   3 cubic feet of volume or smaller with pressures not exceeding 350 PSI
    •   1.5 cubic feet of volume or smaller with pressures not exceeding 600 PSI
  • UM Vessels are inspected and tested by a manufacturer's own certified individuals.
 

Note that there may be exceptions to the ASME Certification requirements, depending on your state and local municipality.

Apache manufactures tanks and vessels for compliance and regulated industries, including pharmaceutical, food and beverage, petrochemical, biofuels, chemical and life science. We hold these certifications: ASME U Certificate, ASME UM Certificate, National Board of Boiler & Pressure Inspectors R Certificate, and National Board of Boiler & Pressure Vessel Authorization to Register Certificate.

Questions? Please call and ask for a Sales / ASME Specialist at 920-356-9900.

 


5 Things to Consider Before Ordering a Tank

Apache is a custom manufacturer of tanks and vessels. Due to our customized offering, we want to provide the exact vessel you need; and that might lead to many questions and back and forth responses.  If you don't have a specification list, here are 5 recommendations for you to determine when ordering a tank.

1. Determine pressures and temperatures.  The design criteria, pressures and temperature requirements will impact material grades, thicknesses, compatibility of fittings and components, and elastomer selection.  The following items may help to determine pressures and temperatures.

  • Minimum temperature
  • Maximum allowable temperature
  • Maximum allowable pressure
  • Hydrostatic test pressure
  • Design Vacuum
  • Corrosion Allowance
     

2. Determine type of certification required.  It is advantageous to  identify the types of certification and documentation (turn-over packets) that will be required for planning purposes.  The following are common requested certificates.

 

  • As-built drawings
  • ASME data report
  • Weld traveler (Tracks material identification numbers and welders)
  • Material certificates or material test reports (MTR's, Material Test Reports to certify the chemistry of the materials)
  • Weld procedure (WPS)
  • Weld procedure qualification (PQR)
  • Weld map
  • Electropolish certificate (ASTM B912)
  • Pickle passivation cert (ASTM A380)
  • Surface finish certificates
  • Hydrostatic test certificates
  • Drainability certification
  • Sprayball test certificate
  • Tank checklist
  • Radiography certificates
  • Copy of name plate
     
3. Provide Dimensions:  In addition to the diameter and size requirements of the vessel, we also want to discover portable height and production floor restrictions.
 
4. List Finishes:  Determine the compliance requirement for finishing both inside and outside of the vessel.
 
5. Indicate use of vessel:  Even a general knowledge of the use of the vessel will help to determine design and compliance criteria.
 
Questions? Contact a Small Vessel Sales Tech at 920-356-9900

 


A Comprehensive Read on Heat Transfer Surfaces

To help inform our tank and vessel customers about jacketed vessels and heat exchange surfaces, Apache shares this e-book that in-house specialists produced, "Abstract and Attributes of ASME Vessel Heat Transfer Surfaces".

Jacketed vessels are used in many industries and can remove the elevated heat of reaction (heat reactor vessel) or reduce the viscosity of high viscous fluids. There are basically three types of external jacketed heat transfer surfaces: conventional jacket, half pipe jacket and dimple jacket, which are welded to the outside of the vessel. Internal coils can also be used as a stand alone option or in combination with other types of external jackets.

Complimentary Download


How to Plan for CRN in your Next Tanks or Vessel Project

CRN is a Canadian Registration Number issued by each province or territory of Canada for the design and manufacture of boilers, pressure vessels and fittings to be shipped for use in Canada. It is important to note that each province and territories have unique application criteria for CRN.

Some fittings, piping and components are pre-approved for CRN, while others will require detailed calculations and/or testing to verify compliance. Certain design attributes may be accepted by some provinces or territories, but not by others. Further, some provinces and territories require a PE (Professional Engineer) stamp, but not all have this requirement.

One process is consistent; each province and territory requires the submission of the design to the CRN regulatory agency and the equipment must have a CRN number before it can ship and be placed in service.

How can manufacturers and processors plan for CRN for their tank and vessel projects? Start wth early planning and consider vessels as a long lead item. Determine design and shipping requirements at the onset of scope management discussions and allow several weeks, depending on project complexity, for the CRN number to be granted.

Apache provides CRN support on new projects as well as on used vessels orginally used in domestic markets that the customer desires to place into service in Canada.

Having exported to Canada for over 40 years, Apache's small vessel and large tank team have extensive experience with Canadian regulatory requirements and documentation. Apache has produced CRN vessels for many industries including oil, gas, energy, pharmaceutical, cannabis processing, health and beauty,  and food and beverage. Apache has provided design, review and registration services for a variety of tank and vessel applications including extraction, evaporation, thermal processing, mixing and batching.

 


When do you need an R-stamp for repairs to an ASME tank?

The National Board of Boiler and Pressure Vessels requires a Certificate of Authorization and R-Stamp for the repair or alteration of boilers, pressure vessels and other pressure retaining equipment.

Any repairs to the ASME pressure zones on tanks require an R-Stamp. Any repairs not in that designated area will not require an R-Stamp.

Apache's Field Service Technicians are fully certified ASME welders. For over 40 years, Apache continues to maintain rounds of audits and inspections from ASME compliance and safety professionals that speak to the consistency of the welders and the effectiveness of the quality control department.

Our Field Service team are  R-Stamp certified. Apache will also provide all compliance addendum documentation required for ASME repairs of modifications in the field.

A host of modifications are available to ASME and non-ASME tanks and vessels. We offer a feasibility audit to compare field modifications to the cost of a new system.

Call Joe Hertel, Field Services Manager,  at 920-356-7334 to discuss your application.


Sometimes Tank Damage Isn't as Bad as You Think

Sometimes things just happen, like a tool accidentally falling into the tank and causing damage.  The damage might be a bent agitator or it might be damage to a side wall or baffles.  We see these kinds of things all the time and we can fix them most of the time.


Repair and refurbish experience:
  • Repair and replace agitator shafts
  • Add agitation to a non-agitation vessel
  • Refurbish outlet valves, seals, or-rings and gaskets
  • Relocate nozzles and fittings
  • Replace manways
  • Repair jackets (conventional, dimple, half-pipe)
  • Add cooling or heating coils
  • Detect and repair leaks
  • Refinish product contact surfaces
  • Repair sidewalls
  • Change bottom head configurations
  • Modify tanks, platforms, catwalks for repurposing
  • Convert non-pressured vessel to pressurized (if approved by engineering)

Download the Tank Group Field Services flyer


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