Cryogenic Storage & LNG Equipment calculator
Cryogenic Weld Inspection Energy Load Calculator
Cryogenic weld inspection energy load tells you how much electricity your NDE rig consumes and what it costs per weld on cryogenic and LNG fabrication. QA leads and fabrication estimators use it when running radiography, phased-array ultrasonics, or PMI on the inner and outer shells of vacuum-jacketed tanks, where every circumferential and longitudinal seam is 100% inspected. Because cold-service welds carry zero tolerance for leak paths, inspection runtime is long and the connected load of X-ray crawlers, UT phased-array units, and chillers adds up. This calculator converts that load into a defensible per-weld energy cost.
What this calculator does
- Calculate the electricity cost tied to weld inspection equipment used for cryogenic vessels, piping, and LNG skids.
- Use it when cryogenic weld inspection energy load in cryogenic storage and lng equipment is being quoted and energy is a real chunk of the cryogenic storage and lng equipment cost stack.
- It computes inspection energy in kWh from connected load times runtime, then the energy cost at your rate, and divides by welds inspected to get cost per weld.
Formula used
- Inspection energy used = inspection equipment connected load × weld inspection runtime
- Weld inspection energy cost = inspection energy used × blended electricity rate
- Energy cost per weld inspected = weld inspection energy cost ÷ welds or weld inches inspected
Inputs explained
- Inspection equipment connected load:
- Weld inspection runtime:
- Blended electricity rate:
- Welds or weld inches inspected:
How to use the result
- Use it when costing an NDE campaign, allocating utility overhead to a fabrication job, or comparing inspection methods by energy intensity.
- It uses average connected load and ignores duty cycle, so equipment that idles between exposures will show a lower true draw than nameplate kW implies.
Current U.S. benchmarks
- As of Apr 2026, industrial electricity averages 8.7 cents per kWh across the U.S. (EIA), up 5.5% from a year earlier. State averages range widely, so plants should confirm against their own tariff.
- Global copper trades at $13,484 per tonne (IMF via FRED, May 2026), up 41.5% in a year, and U.S. industrial electricity averages 8.66 cents per kWh. Both feed electrified-hardware unit economics.
- Steel mill PPI stands at 348.53 (BLS, May 2026), up 6.7% from a year earlier. New factory orders are up 2.3% year over year (Census).
Common questions
- How do you calculate weld inspection energy cost? Multiply connected load by runtime to get kWh, then multiply by the electricity rate. At 12 kW for 8 hours you use 96 kWh, and at $0.12/kWh that is $11.52.
- What is the energy cost per weld? Divide total energy cost by the number of welds or weld inches inspected. In the example $11.52 over 1,000 welds is about $0.0115 per weld, a near-negligible per-unit energy cost.
- Does this include the cost of NDE labor or consumables? No. This is electricity only. Film, couplant, certified inspector time, and chiller maintenance are separate line items and usually dwarf the energy cost.
- Why is connected load high for cryogenic weld inspection? Vacuum-jacketed vessels require full-coverage radiography and phased-array UT, often with crawlers, generators, and cooling, so the combined draw of the inspection train is well above a single hand-held UT unit.
- How do I get the blended electricity rate? Take your total facility energy spend divided by total kWh, or use the utility rate including demand charges spread over usage. The $0.12/kWh default is a typical US industrial blended rate.
Last reviewed 2026-05-12.