Boiler Blog Archive | Nationwide Boiler Inc.

Nationwide Boiler is pleased to announce that we recently secured our largest rental project in our fifty one year history! This long-term rental includes three (3) 200,000 lb/hr, 750 psi / 750F superheated steam, skid-mounted package Babcock & Wilcox watertube boilers. We are also supplying a plant master work station and one (1) deaerator with pumps for the duration of the rental. The equipment will support the start-up of Saudi-Aramco's 106-square-kilometer refinery and terminal in Jizan, Saudi Arabia.

The first boiler was loaded at the Port of Houston over this past weekend, beginning a six week journey to the Port of Jizan. The other two boilers, along with additional equipment, will be coordinated in a phased shipment process.

Take a look at the time lapse video below to see the first boiler being loaded on the ship, and read our press release for additional details on this major rental project.

Great job to all involved and we look forward to a successful project!

In the boiler industry, there are three main types of watertube boilers: D-type, O-type, and A-type (see the graphic). Boilers can be designed for either saturated or superheated steam, and they can be packaged or field-erected. Package watertube boilers are designed to be small enough for highway transportation and are factory assembled. Field-erected boilers are just as they sound; multiple components are assembled and installed in the field.

For each boiler type, there are differences in superheater design and performance. Before diving into those differences, let’s review each of the main types of watertube boilers. 

D-type boilers have one steam drum and one lower drum, centered over each other with the furnace offset to one side. These boilers are designed with only one generating bank. 

O-type boilers also have one steam drum and one lower drum, however, they are centered over each other with the furnace in the center. These boilers are designed with two generating banks (i.e. the flue gas flow splits into the two sides at the end of the furnace). 

A-type boilers are similar to O-type and include two generating banks. The major difference is the number of drums and placement. A-type boilers include one steam drum at the top center, and two lower drums; one placed on each side of the furnace.