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Piping stress analysis uk ~ Ducting stress analysis uk ~ Fatigue assessment uk ~
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PIPING STRESS ANALYSIS, PIPE SUPPORT and PIPING DESIGN
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1. Piping/Ducting Stress Analysis - using computer analysis (Caesar II or Algor's PipePlus), 'approximate methods' and hand-calculations for a new or existing piping systems.
Codes: ASME/ANSI B31.1, B31.3, B31.4, B31.8, API PP530, BS 806, IP6 & IGE/TD/12.
2. Piping/Ducting Stress Analysis Auditing to above codes.
3. Pipe/Ducting Support Design/Drafting to above codes and BS 3974 (Parts 1, 2 & 3), MSS SP 58, SP 69 & BS 449.
4. Vessel nozzle calculation check to ensure piping loads on vessel nozzles meet applicable codes (WRC107/297 or PD5500) and vendor specified limits
5. Fatigue assessment to PD5500, ASME or DnV codes
6. FE Analysis of pipe intersections, attachments, etc. (software: NEI Nastran)
7. Conceptual Design Development, Design Studies and Design Optimisation.
8. Piping General Arrangements and Isometric Drawings Production (CAD).
9. Estimation, M.T.O. and Costing.
10. Problem Solutions (in design, commissioning and plant operation phases).
Typical Examples:
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| Refineries, power generation, chemical, food, pharmaceutical, refrigeration plants, etc. | |
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Piping on semi-submersible/fixed platforms and FPSO's
Examples below:
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1. Risers: Riser piping under slaming waves, currents & wind loads and special pipe support design
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2. Platform Topside: High pressure discharge piping, flare piping, process, etc. (rating up to 2500#) and associated pipe supports and frames
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Skid piping in onshore/offshore projects (up to 350mm dia., steady and cyclic pressure and temp., up to 240barg)
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Heating & Refrigeration Piping
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Steam, chiller & condenser piping (up to 500mm dia.) & pipe supports in plants & buildings (including vibrations control by springs hangers, etc.) and mine shaft piping up to 350mm dia and 2.2Km(!) deep, bottom and/or top supported
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Special Alloys & Plastic Piping
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Stainless Steel & misc. exotic material piping;
extensive variaty of plastic piping in Platinum Refinery & Demineralisation Plants
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Ducting & Ducting Support Design
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Elevated temperature ducting (up to 1.5m dia. @ temp. up to 1150degC) from turbine exhausts, economisers, etc. and associated support frames
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Pipe Support Design & Drafting
Examples:
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1. Onshore applications: Steam Header Spring Supports and Restraints
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| 2. Onshore applications: Steam Header Supply Rollers | |
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3. Offshore applications:
HP Water Injection Piping | |
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4. Offshore applications:
HP Flare Header & Branch Piping on fixed & FPSO platforms
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SPECIALIZED CALCULATIONS:
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Other than the formal design and analysis calculation requirements stipulated by the code (i.e., sustain loads, pressures, temperatures, occasional loads, etc.), we also specialize in the following:
1. Fatigue assessment
2. Wind, Wind Vibrations & Wind Vortex Loads
3. Seismic Calculations
4. Ocean wave slamming & stream loads on piping/pipe support structures
5. 'Water hammer' & pressure surge calculations
6. Mixed flow induced loads (slugs, etc.) calculated in respect of piping dynamic characteristic
7. Pulsating flow lines (reciprocating compressors, etc.) and design of such piping and pipe supports. Vibrations dampening by springs and misc. devices
8. Pressure reaction forces (safety valves, lines with un-tied bellows, etc.) and associated equipment selection
9. Thermal/Mechanical Stress Calculations
10. Secondary & Discontinuity Stresses
11. Piping under vacuum conditions (and/or external pressure)
12. Jacketed piping
13. Effect of piping loads on shells of vessels & tanks (local loads calculations)
14. Flange design and flange joint leakage calculations
IMPORTANT FLEXIBILITY NOTE:
Contrary to common belief, excessive flexibility (additional pipe lengths and elbows, often introduced by inexperienced stress engineers) can some times create more problems than insufficient flexibility. This is due to the additional cost of added piping (material and fabrication), pumping energy, potential cavitations and slug forces in pump suction lines, etc.
Our specialty is in selecting the most cost effective piping layout and flexibility components for a given mechanical equipment layout configurations, thus providing important saving to the piping contractor and end user.
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