The chemical plant I work in uses the constant-pitch 8-thread series for fasteners over 1" in diameter.
Many items we get that have tapped holes in them like valves and expansion joints, though, are tapped for coarse thread fasteners, or 7 TPI for 1-1/8" and 1-1/4" diameters.
What do most of...
The chemical plant I work in uses B-7 bolting for all piping flange assembly. Confusion has surfaced recently regarding what thread pitch we standardize on for bolting over 1" diameter. For 1-1/8" and 1-1/4" bolts we have a mix of 7 TPI and 8 TPI fasteners.
I consulted John Bickford's "An...
I'm in a debate over fouling factors for plate & frame heat exchangers. A customer requirement is 0.005 fouling factor on all heat exchangers for a project, but one HX is a plate and frame unit, so the fouling factor doesn't apply. The plate and frame suppliers talk in terms of % excess area...
I'm trying to size a rupture disk for the hot side of a plate and frame heat exchanger. The fluid can potentially be trapped in the heat exchanger by actuated valves on the inlet and outlet. What should I use as the wetted surface area for the fire sizing case? I was considering treating the...
