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Note: This is a sub-section of Superheater Co
Visit of the Iron and Steel Institute to the Iron, Steel and Engineering Industries of Manchester and District
The Superheater Company Ltd., Trafford Park.
The Superheater Company specialises in the design and construction of superheaters for all types of boilers. The several lengths of tubing comprising each element are mechanically united to provide return bends. Three plants are installed for this purpose, and they will be of interest as being the only ones of their kind in Great Britain.
The largest plant is used for the manufacture of elements for stationary boilers, the tubing for which varies in size from 1.5" to 2" outside diameter. The intermediate plant produces locomotive elements from tubing 1.25" to 1.5" outside diameter, whilst the smallest plant is used for manufacture of elements for marine smoketube boilers, the tubing varying in size from 16mm. to 25mm.
Headers for locomotive superheaters are made of high grade cast iron; those for marine superheaters are either hollow steel forgings or machined from the solid billet headers for stationary boilers, with working pressures up to 2,000 lbs. per square inch, are bored and turned from solid forgings, the flanges and branches being formed integrally. Stationary headers, with working pressures below 400 lbs. per square inch, are generally made from heavy solid drawn tubing. Note should be taken of the multiple valve locomotive regulator headers, in which a number of comparatively small valves open or close in sequence.
Another interesting development is the use of Sinuflo tubing for locomotive superheaters with which increased heat transfer is obtained as compared with straight tubing. Attention is drawn to the triple mechanical pipe forging used with certain designs of these elements. Another interesting feature in connection with the elements is the special forging machine for staving up material from which the metal-to-metal ball joint is machined.