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This week Nationwide Boiler has been conducting phase 1 of 2 of a pre-delivery testing procedure for the recent sale of five (5) 650 hp mobile boiler rooms. With this process, Nationwide intends to demonstrate the operational performance of these boilers to the customer, as well as begin familiarizing the customer with the equipment.

The test-fire includes live firing on natural gas at the rated design input of each mobile boiler room, and an oil fire for units equipped with back-up fuel. All safety devices are being tested at their set-points, and emissions are being recorded to ensure they meet local NOx and CO requirements.


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Early last year the National Board announced a new inspector certification program providing both new and seasoned employees the opportunity to receive recognized credentials for their expertise. This program, the Pressure Equipment Inspector (PEI), is a first of its kind.

The PEI was designed for a few reasons; (1) to enhance an individual’s knowledge of the inspection process associated with boilers and pressure vessels, (2) to allow individuals performing inspections to receive a certification recognizing their scope of work, and (3) as a way to assist individuals as well as organizations in improving the overall quality and safety of pressure equipment by having a better understanding of proven, reliable, and uniform inspection methods.1 Inservice and new construction are the two areas of inspection recognized under the program, and an individual can hold either one or both of these certifications.

To qualify for the PEI certification, an individual must attend and complete the National Board’s inservice and/or the new construction inspection course, take the final exam and earn a passing score, and provide a minimum of three years of qualifying experience. Then an online application must be completed and submitted for approval via the National Board website. Upon approval, a certificate and PEI ID card will be issued.

It is important to understand that the PEI will not be certified to perform the required ASME Boiler and Pressure Vessel Code inspections or those required by the National Board Inspection Code.

To learn more about the new National Board PEI certification, visit the National Board website at



1 The Pressure Equipment Inspector, Today's Boiler, Spring 2013,

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NEMA enclosures are used in industrial applications to house and protect variable frequency drives and other electrical equipment. Each enclosure has its own rating to designate the type of application for which that particular enclosure was built for; NEMA 3R and NEMA 4X were built for and are most commonly used for outdoor installations. Having an understanding of each enclosure is important when choosing which one is best for your particular application.

NEMA 3R enclosures are generally used for applications such as rooftop air handling units, irrigation pumps, and water/waste-water pumps. They are made from carbon-steel and equipped with white-powder coated paint and fans for temperature regulation. The fans include filters to keep dust, dirt, and insects from entering the enclosure. NEMA 3R enclosures are versatile in the fact that a viewing window can be installed for internal component viewing, and they can be wall-mounted in environments with potential flooding issues. Installation is rather simple and costs are lower than the alternative, but the enclosures are not protected in corrosive environments.

The alternative, NEMA 4X enclosures, are more expensive due to the addition of an air conditioner in place of the fans. However, there are some significant advantages to using the more costly enclosure. NEMA 4X enclosures are stainless steel creating a corrosive-free enclosure, they are equipped with an air conditioner in lieu of fans for better temperature control, and they are the preferred alternative when NEMA 3R cannot be used. Like NEMA 3R enclosures, they can be wall-mounted and a viewing window can be installed, but installation of the enclosure is more complex. The biggest disadvantage of the NEMA 4X enclosure is its high cost; the larger the enclosure the higher the cost, and operation and maintenance can get pricey as well.

Overall, it is crucial to understand the differences between the enclosures to make an informed decision and save money in the long run. For more detailed information on the features of both NEMA enclosures, check out this article from HPAC Engineering Magazine.

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Here at Nationwide Boiler we are continually striving to exceed our customer's expectations. This includes every aspect of our business including customer service, delivery and the quality of our products.

If you have done business with us in the past or are currently working with us on a particular project, please take a moment to rate your experience with you. Our Quality Quiz takes only a few minutes and it helps our leadership team continuously improve our products and services.

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