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Recent content by spt
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Flat bottoms in ASME BPV VIII???
Sec VIII Div 1 does allow flat heads, please refer UG-34 Unstayed Flat Heads And Covers, because it is allowed does not make it a practical, good, or an economical design. If the pressure vessel is designed with two dished or formed heads and installed vertically then the lower head can could...- spt
- Post #3
- Forum: ASME (mechanical) Code Issues
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HYDRO-TEST AFTER REPAIR TO NEW VESSEL
No where does Sec VIII Div 1 address alterations to pressure vessels in the field. Repairs and alterations to ASME B&PV after the signing of the Manufacturers Data Report are covered in the NBIC, Part RC 1000 and RC 3000. The NBIC will refer you back to the design code for the specifics, but...- spt
- Post #8
- Forum: ASME (mechanical) Code Issues
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Use of Dual Certified Materials
I believe the confusion comes from failing to ID material by specification, in the field material at times will be identified by type or grade only. Spec for Seamless Ferritic and Austenitic Alloy-Steel Boiler, Superheater and Heat-Exchanger Tubes Spec No, Type/Grade UNS Alloy No. P-No...- spt
- Post #2
- Forum: ASME (mechanical) Code Issues
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Plug weld specifications
Also: AISC, Part 8, Welded Construction, Plug and Slot Welds- spt
- Post #4
- Forum: Welding, Bonding & Fastener engineering
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Butt Weld Penetration Depth
If you are welding structures to be used for something other than a home project, decoration or temporary supporting during fabrication then I perplexed as to why any welding would be accomplished without joint preparation, especially if the completed weld is to be subjected to loads and...- spt
- Post #5
- Forum: Welding, Bonding & Fastener engineering
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Boiler Hydrotest
I will assume this is a field erected boiler designed to the requirements of the ASME BPVC having an operating pressure, temperature and/or a diameter that exceeds the allowable limit for threaded attachments. This action would be classified as a repair. If you desire to continue having a...- spt
- Post #4
- Forum: Boiler and Pressure Vessel engineering
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HYDRO-TEST AFTER REPAIR TO NEW VESSEL
The removal of an existing nozzle and the installation of new nozzle is known as an alteration. If this is a new unit and the equipment owner desires the manufacturers warranty and the ASME certification to remain valid then the alteration needs to be accomplished in accordance with the NBIC...- spt
- Post #2
- Forum: ASME (mechanical) Code Issues
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What is difference between Code, Standard and Professional Documents?
A Code is a systematic statement of a body of law; especially one given statutory force. A Standard is something set up and established by authority as a rule for the measure of quality. As a designer you need to be aware of the Federal, State and County Codes. Many of these jurisdictional...- spt
- Post #3
- Forum: Pipelines, Piping and Fluid Mechanics engineering
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The corrosion allowance in boiler part
From the standpoint of corrosion, pressure vessels may be classified under one of the following groups: a) vessels in which corrosion rates may be definitely established. b) vessels in which corrosion rates, while known to be relatively high, are either variable or indeterminate in magnitude...- spt
- Post #3
- Forum: Boiler and Pressure Vessel engineering
