In my opinion, the design you show with the gasket described would create no measureable moment between the gasket and the bolts. The closest Figure UG-34 design would be (p), which corresponds to a flat faced gasket that also has no edge moment loading.
This this in mind, the design...
We were recently considering a hydrostatic test exemption, following API-653. The repair of the annular plate was considered major and did not fall under the shell repair or minor shell jacking sections. This left the fitness for service evaluation for hydrotest exemption. Although the...
API 570 states that “Temporary repairs may remain in place for a longer period of time only if approved and documented by the piping engineer.” Assuming a full encirclement sleeve has been designed for appropriate stress conditions, can “longer” be considered to be the life of the enclosed...
Lee,
You should be able to use the design for the 12" on the 8" & 10". The material lists 5/8" eye-bolt and plate. With this size, you will still have nearly 0.25" on both edges of the flange for a fillet weld (8" - 150#). The davit will be a little over designed, but shouldn't present a...
Pressure Vessel Handbook by Eugene Megyesy has a page on horizontal and vertical opening manway davits. It does not go through calculations, but rather drawings with a table covering different cover sizes. These range from 150# to 900# and 12" to 24".
Has anyone found a documented conversion for estimate wall loss when provided with a section of Iron Oxide taken from carbon steel?
I have heard estimates ranging from 5:1 to 8:1, but have not found anything documented.
I agree, typically piping systems don't use 9 Chrome when 5 Chrome can be used. Since ASME B16.48, section 2.2.3 states that mixed material joints (including blanks) need to use the lower rating, make sure that the working pressure from B16.5 for the material is high enough for your application...
ASME B16.48 states that blank materials shall be in accordance with ASME B16.5, Table 1A. 9 Chrome material is listed on Table 1A under A 182 Gr. F9. I would use 9 Chrome for most operating cases, but as pennpiper, would consider using another material if there would be no way that the blind...
Luis,
About 12 years ago, I spent several years working as a contractor performing IRIS inspections on heat exchangers. At the time, the majority of the refineries took action when they saw 50% wall loss. The action varied, based on time in service (corrosion rate), number of tubes that...
UG-125 states that all pressure vessels within the scope of this division, irrespective of size or pressure, shall be provided with pressure relief devices...
UG-135(b)(1) states The opening through all pipe, fittings, and non reclosing pressure relief devices between a pressure vessel and its...
The standard wall thicknesses for seamless copper pipe can be found under ASME II, SB-42, "Specification for Seamless Copper Pipe, Standard Sizes".
The ODs are the same as carbon steel, but the thicknesses are different. For example, standard wall for a 1" carbon steel pipe is 0.133", where...
