Engineering Calculations and Analysis – Every Type, Small or Large
Need an engineering calculation? SLETEC prepares calculation reports for almost every mechanical, piping, structural and process need, from a single lifting lug check to a full FEA or CFD study.
Every calculation comes with a clear report: inputs, code references, results and conclusions, ready to submit to your client, consultant or Saudi Aramco reviewer. See the full list of calculations below.
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FEA – Finite Element Analysis
Stress check of a part
Linear static stress analysis (ANSYS Mechanical)
Strength check with large movement or contact
Nonlinear analysis (material, geometric, contact) (ANSYS)
Will it bend or collapse?
Buckling analysis (linear and nonlinear) (ANSYS, ASME VIII Div. 2)
Will it crack over time?
Fatigue analysis (ASME VIII Div. 2 Part 5, BS 7608, IIW)
Heat and temperature check
Thermal and thermal-stress analysis (ANSYS)
Natural frequency check
Modal analysis (ANSYS)
Vibration response check
Harmonic and random vibration analysis (ANSYS)
Sudden load / impact check
Transient dynamic and drop / impact analysis (ANSYS)
Earthquake check
Seismic response spectrum analysis (ANSYS, ASCE 7, SBC 301)
Nozzle load check
Nozzle and local stress analysis (WRC 107 / 297 / 537) (ANSYS, PV Elite)
Pressure vessel FEA
Design by analysis, ASME VIII Div. 2 Part 5 (ANSYS)
Tank FEA
Tank shell, settlement and nozzle FEA (API 650 / 653) (ANSYS)
Bolt and flange check
Bolted joint and flange FEA (ANSYS, ASME PCC-1)
Weld strength check
Weld stress analysis (ANSYS, AWS D1.1)
Lifting lug / trunnion FEA
Lifting point FEA (ANSYS, ASME BTH-1)
Crack or damage check
Fracture mechanics, API 579 Level 3 (ANSYS, API 579-1/ASME FFS-1)
High temperature life
Creep analysis (ANSYS, API 579)
Structure or platform FEA
Structural FEA of frames and platforms (ANSYS, STAAD Pro)
CFD – Computational Fluid Dynamics
Flow simulation inside pipes or equipment
Internal flow CFD (ANSYS Fluent / CFX)
Pressure drop calculation by simulation
Pressure drop and flow distribution CFD (ANSYS Fluent)
Heat flow simulation
Conjugate heat transfer CFD (ANSYS Fluent)
Oil, gas and water mixture flow
Multiphase flow CFD (ANSYS Fluent)
Mixing tank simulation
Agitator and mixing CFD (ANSYS Fluent)
Separator internals simulation
Separator and vessel internals CFD (ANSYS Fluent)
Air flow / ventilation simulation
HVAC and ventilation CFD (ANSYS Fluent)
Gas leak spread
Gas dispersion CFD (ANSYS Fluent)
Wear by sand or particles
Erosion CFD (ANSYS Fluent, DNV RP O501)
Liquid moving in a tank
Sloshing analysis (ANSYS Fluent)
Powder or grain flow in a silo
Silo flow and pressure CFD / DEM (ANSYS, EN 1991-4)
Fan, pump or blower flow
Turbomachinery flow CFD (ANSYS CFX)
Wind flow around structures
External aerodynamics / wind load CFD (ANSYS Fluent)
Fluid–structure check
Fluid–structure interaction (FSI) (ANSYS)
Vibration and Dynamic Analysis
Machine vibration problem
Vibration analysis and troubleshooting (ANSYS, ISO 10816 / 20816)
Natural frequency / resonance check
Modal and resonance analysis (ANSYS)
Pump or compressor foundation vibration
Machine foundation dynamic analysis (ACI 351.3, DIN 4024)
Pipe shaking
Piping vibration analysis (Energy Institute guidelines, CAESAR II)
Vibration from flow
Flow-induced vibration (FIV) (Energy Institute AVIFF)
Vibration from noise in pipes
Acoustic-induced vibration (AIV) (Energy Institute AVIFF)
Small pipe connection cracking
Small-bore connection assessment (Energy Institute AVIFF)
Compressor pulsation
Pulsation and mechanical response study support (API 618)
Platform or floor vibration
Structural vibration and footfall check (AISC DG 11)
Shaft vibration
Rotor and torsional vibration check (API 684)
Earthquake / seismic check
Seismic analysis of equipment and structures (ASCE 7, SBC 301, UBC)
Wind vibration of tall stacks
Vortex shedding analysis (ASME STS-1, EN 1991-1-4)
Pipe Stress and Piping Calculations
Pipe stress check
Pipe stress analysis (CAESAR II, ASME B31.3 / B31.1)
Pipe expansion check
Flexibility and thermal expansion analysis (CAESAR II)
Pump / compressor nozzle load
Equipment nozzle load check (API 610, 617, 661, NEMA SM23)
Flange leak check
Flange leakage analysis (ASME VIII App. 2, NC-3658)
Pipe support spacing
Support span calculation (MSS SP-58, ASME B31.3)
Pipe thickness calculation
Wall thickness calculation (ASME B31.3, B31.4, B31.8)
Branch / reinforcement check
Branch reinforcement calculation (ASME B31.3)
Pipe size calculation
Line sizing and velocity check (API RP 14E, Crane TP-410)
Pressure drop
Hydraulic and pressure drop calculation (Crane TP-410)
Water hammer
Surge and water hammer analysis (AFT Impulse)
Slug force on pipe
Slug and dynamic load analysis (CAESAR II)
Buried pipe check
Buried pipeline stress analysis (ASME B31.4 / B31.8)
Spring hanger selection
Spring hanger sizing (CAESAR II)
Relief valve line check
PSV reaction force and line analysis (API 520 / 521)
Tank, Vessel and Heat Exchanger Calculations
Tank thickness calculation
API 650 shell, bottom and roof design (API 650, AMETank / Excel)
Tank wind and earthquake check
Wind girder, overturning and seismic design (API 650 Annex E)
Tank repair calculation
API 653 minimum thickness, remaining life and repair (API 653)
Tank vent size
Tank venting calculation (API 2000)
Tank settlement check
Tank settlement evaluation (API 653 Annex B)
Vessel thickness calculation
ASME VIII Div. 1 shell, head and nozzle design (PV Elite / COMPRESS)
Vessel max pressure
MAWP, MDMT and hydrotest pressure (ASME VIII)
Nozzle reinforcement
Nozzle reinforcement and pad design (ASME VIII UG-37)
Saddle / skirt / leg check
Zick saddle analysis, skirt and leg supports (ASME VIII, Zick method)
Vessel wind and seismic
Wind and seismic loads on vessels and columns (ASCE 7, SBC 301)
Heat exchanger calculation
Mechanical design to TEMA and ASME VIII (TEMA, PV Elite)
Tubesheet calculation
Tubesheet and expansion joint design (ASME VIII UHX, TEMA)
Flange design
Custom flange design (ASME VIII App. 2)
Corrosion / remaining life
Remaining life and inspection interval (API 510, API 570, API 653)
Fitness for service
FFS Level 1 / 2 / 3 (API 579-1/ASME FFS-1)
Structural, Lifting and Foundation Calculations
Steel structure calculation
Steel member and frame design (AISC 360, STAAD Pro, SAP2000)
Connection / bolt calculation
Bolted and welded connection design (AISC 360, IDEA StatiCa)
Base plate and anchor bolt
Base plate and anchor design (AISC DG 1, ACI 318)
Wind load calculation
Wind load to code (ASCE 7, SBC 301)
Earthquake load calculation
Seismic load to code (ASCE 7, SBC 301)
Lifting lug calculation
Lifting lug, padeye and trunnion design (ASME BTH-1, DNV)
Lifting beam calculation
Spreader bar and lifting beam design (ASME BTH-1)
Crane lift plan
Rigging study and critical lift plan (ASME B30, Aramco GI 7.030)
Transport / sea fastening
Transport and sea fastening calculation (DNV-ST-N001)
Platform / staircase calculation
Platform, stair and handrail design (AISC, OSHA)
Pipe rack calculation
Pipe rack structural design (AISC, PIP STC01015)
Crane girder calculation
Crane runway design (AISC DG 7, CMAA)
Foundation calculation
Equipment and tank foundation design (ACI 318, SBC 304)
Concrete calculation
Reinforced concrete design (ACI 318, SBC 304)
Weight and centre of gravity
Weight and COG report (SolidWorks / Excel)
Thermal, Process and Hydraulic Calculations
Heat transfer calculation
Heat transfer and duty calculation (Excel, HTRI)
Insulation thickness
Insulation thickness and heat loss (ASTM C680)
Pump size and NPSH
Pump sizing and NPSH check (Hydraulic Institute)
Fan / blower sizing
Fan and blower selection (AMCA)
Relief valve sizing
PSV sizing support (API 520 / 521)
Heating / cooling time
Tank heating and cooling calculation (Excel)
Steam trap / steam line
Steam system calculation (Spirax Sarco method)
Ventilation load
HVAC load and ventilation calculation (ASHRAE)
Manufacturing and Design Calculations
Bolt tightening torque
Bolt torque and preload calculation (ASME PCC-1, VDI 2230)
Shaft / gear / bearing check
Shaft, gear and bearing life calculation (AGMA, ISO 281)
Fit and tolerance check
Tolerance stack-up and GD&T (ASME Y14.5, ISO 286)
Spring calculation
Spring design (EN 13906)
Sheet metal flat size
Flat pattern and bend allowance (SolidWorks)
Weld size calculation
Weld sizing (AWS D1.1)
Material selection
Material selection and corrosion allowance (NACE MR0175, ASME II)
Cost and weight estimate
Weight, BOM and cost estimation (Excel)
Frequently Asked Questions
Can you do just one calculation?
Yes. Single calculations are welcome, with a fixed price agreed before we start.
Will the report be accepted by my client?
Our reports follow the required codes and list all inputs and references so reviewers can check them easily.
Which software do you use?
ANSYS, CAESAR II, PV Elite, STAAD Pro, SAP2000, SolidWorks and Excel.
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