Pier Nielsen's super heater.
What series of tubing/pipe and size and how long is it?
BOURDON BOILER WORKS
Specifications for 20hp 16" high boiler.
CONSTRUCTION AND MATERIAL SPECIFICATIONS
The boiler shell is assembled from five separate pieces, consisting of a cylinder, top and bottom tube sheets, and top and bottom bands.
The cylinder is ¼” thick and consists of rolled plate with a vertical seam. Material consists of carbon steel (pressure vessel quality – ASTM A515, grade 70). Minimum tensile strength of this material is 70-90 KSI. A515 is a recognized material grade for boilers and pressure vessels. The inside diameter of the cylinder is 23-1/4” by 15-7/8” high. The vertical seam on the cylinder is welded from the outside, following bevel grinding. A steel bar (ASTM A36) 1” wide by ¼” thick is first clamped and centred over the joint on the inside of the cylinder extending its full length enabling full root penetration of the outside weld of the bevelled butt joint and to the backing plate. Following this operation, a single fillet weld is placed on each side of the backing plate on the inside. 7018 electrode rod is used for the above processes. The outside weld to the seam is ground flat, enabling placement of .050” diameter cadmium coated spring wire (tensile strength 309,000 pounds) between the bands. The wire is uniformly applied to the cylinder between the bands in three separate layers under tension (60 pounds). The spring wire is secured to the cylinder by screws placed into the bottom band and 1/16” holes drilled through the top bands. Breaking strength of a single wire strand is approximately 900 pounds.
Instructions for Layout and Tapping Stanley Boilers
By Don A. Bourdon, Woodstock, Vermont
Stanley boilers are shipped from Bourdon Boiler Works with two pipe tap openings on the top sheet only. One is in the center and it is tapped to 3/8 NPT. It serves as the steam outlet for the throttle. The other tapping is on the outside edge on the top sheet. This is tapped to 1/8 NPT.
When testing a boiler, water enters the boiler in the center as this serves as the inlet for the test pump. The tapping on the outside edge lets the air out of the boiler while it is being filled and serves as a place to attach the test gauge.
Boilers typically are tapped on the bottom sheet to ¼ NPT. I tap 20 HP and 30 HP boilers with 4 openings. 10 HP or smaller boilers are ok with 3 openings. They all serve as bottom blow offs. One exception, however, may be made in the case of a surface blow off used on condensing cars. One bottom blow off is connected to the water level indicator which should be plumbed so it can be shut off from the top and bottom of the boiler, as needed.
For instructions on how to add to our community's blog post, please visit our Get Involved page by clicking on the link above!