Boiler Blog | Nationwide Boiler Inc.

Nationwide Boiler news and events, industry updates, technical information, and more. You hear it first on The Nationwide Boiler Blog!

New 110,000 lb/hr Superheat Boiler Provides Increased Steam Capacity

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With short summers and weather as unpredictable as it is charming, much of Newfoundland and Labrador relies on NARL Refining’s ability to provide warmth and clean fuel. We were able to assist with the refinery’s needs by providing them with one of our new in-stock 110,000 lb/hr trailer-mounted superheat boilers. The 750 psig design watertube boiler was manufactured by Babcock & Wilcox, who recommended Nationwide Boiler for the job per our stock boiler program.

To learn more about the boiler sale and how we were able to accommodate the customer’s need for an immediately available unit, read our latest case study. (PDF will download in a new window.)
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Protect Your Boiler From Freezing Conditions!

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We are well into the winter season, which calls for a quick reminder on freeze protection for any boiler equipment installed outdoors, whether it is a temporary rental boiler or your facility equipment. Taking the proper preventative measures will avoid operational difficulties and major damage to your system. During freezing weather conditions, Nationwide Boiler recommends the following:

1. Enclose both the front and rear of the boiler area and use an external heat source to minimize freezing conditions.

2. Install heat tracing with insulation to protect exposed stagnant water lines.

3. Utilize an appropriate heat tracing method (electric or steam tracing) to all of your main lines and piping components. This includes the following lines, which should be heat traced regardless of whether the boiler is in operation or not (in freezing conditions):

a. Sensing lines (steam drum to CRM, high steam, and steam gauge)
b. Auxiliary low-water cut-off
c. Water column
d. Level control blowdown
e. Main and continuous blowdown (depending on length of piping runs)

4. In addition to heat tracing on stagnant sensing lines, drain the lines and fill them with a 50/50 (water/glycol) solution, making sure to re-connect the line.

5. When an extended boiler down time is expected, completely drain the boiler and stagnant water lines.

The above are recommendations, however, be sure to use sound engineering judgement calls when there are concerns of possible freeze damage to the equipment. And remember, with most rental companies, any freeze damage that requires repairs or replacement of boiler components will be the responsibility of the customer, so it is imperative that you take the correct steps to freeze protect your temporary equipment.

For further details on our freeze protection recommendations, feel free to give us a call at 1-800-227-1966.

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Non-Return Valves: What, Why and How

Trailer-Mounted Boiler with Non-Return Valve
You may not know this, but all Nationwide Boiler rental boiler systems come standard with a non-return valve. These valves are vital to protect the boiler and other plant equipment and are required by the ASME. Let’s review the basics.

What is a non-return valve?
The main function of a non-return valve (NRV), otherwise known as stop or check valve, is to allow steam flow in one direction, and automatically prevent backflow. In other words, they prevent steam from flowing back to the main header of the boiler, or back to a boiler that has failed or is off-line.

An NRV can also be used to isolate a boiler during blowdown and shutdown, and to assist in returning a boiler to operation after any planned or unplanned maintenance.

Why are they needed?
The non-return valve is really just another safety device. Although the NRV should not be relied upon for primary shut-off, it does restrict the flow of steam back from the header into the boiler, which could be disastrous.

Per ASME standards, one NRV is required for one-boiler, high pressure applications (above 15 psig). For high-pressure applications involving multiple steam boilers with manholes that are connected to a common steam main, the steam connection from each boiler must be fitted with two stop valves. The first valve must be automatic and the second should be outside-screw-and-yoke (OS&Y).

How do they prevent backflow?
Non-return valves are flow sensitive, and rely on the steam flow to open and close. The internal disc opens and allows the flow of steam through the valve. The disc will begin to close as forward steam flow decreases or is reversed, depending on the design.

As you can see, non-return valves are critical for any steam boiler system, temporary or permanent. Be sure to check with your temporary equipment supplier to ensure that they include an NRV with their boiler rental package.
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Nationwide Boiler’s S.T.A.R. Delivery Service

At Nationwide Boiler, we have designed and packaged our entire inventory of boilers and steam plants so they can be delivered to customers by any practical means. We call it our STAR delivery service: by Sea, Truck, Air or Rail. Our STAR delivery options provide customers with the convenience and assurance that equipment will be delivered by any practical way possible. 

Most of our inventory can be shipped by truck throughout North America from one of our many storage locations throughout the US. This saves time versus the alternative rail shipment, and can be very convenient for emergency rentals. Our trailer-mounted boilers (up to 125,000 lb/hr) and mobile boiler rooms (up to 1,000 hp) are both built on dedicated highway-legal trailers and are easily transported by truck. Skid-mounted boilers are shop-assembled package boilers and depending on the size of the boiler, units can be transported on a flat-bed or by rail. A crane is required for on- and off-loading of skid-mounted boilers. 

If the jobsite is not accessible exclusively by road, Nationwide Boiler can provide alternate delivery options. Our equipment has traveled on a container ship over the Pacific Ocean and has been loaded onto a plane for quick delivery to jobsites across the country. Nationwide Boiler has supplied equipment by sea, truck, air, and rail to 6 out of the 7 continents in the world.

In addition, Nationwide Boiler has a five point program for delivery success, which means that you can depend on us to deliver quality equipment and cost effective solutions, anywhere in the world! 

1.Our experienced project manager will help prepare the quickest and most convenient delivery to meet your unique requirements.

2.Prior to shipment, all of Nationwide Boiler’s equipment is carefully prepared, packaged, and documented, so it is ready when it arrives on site.

3.We have had years of worldwide delivery success due to our long-standing quality and reliable logistical partners. 

4.We provide proper drawings and documentation to support a successful installation.

5.Nationwide Boiler has 24/7 customer support, providing customers with peace of mind knowing that we are here to help, anytime and when you need it most. 

 

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By Sea ...

A 200,000 lb/hr boiler being loaded on a container ship for trans-Pacific deliery.

By Truck ...

A 70,000 lb/hr trailer-mounted boiler being shipped by road.

 

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By Air ...

A 70,000 lb/hr trailer-mounted boiler being loaded onto an Antonov, AN-124 aircraft for a delivery to the Middle East.

By Rail ...

An 180,000 lb/hr skid-mounted boiler ready for shipment by rail.

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