Plumbing Gas Pipe Sizing Low Pressure Calculator

Screen actual low-pressure gas demand against independently verified same gas/length/inlet-pressure pipe capacities; no high-pressure/compressible formula, installation instructions or gas safety approval.

Description

Low-pressure gas-pipe capacity must match gas, length and inlet conditions.

Low-pressure gas-pipe capacity must match gas, length and inlet conditions. Catalog selection compares flow demand directly.^[1]

The returned values include Caller compatible candidate ids, Signed candidate capacity margins m3 hour. The How section below explains the calculation, input rules and interpretation.

When to use Plumbing Gas Pipe Sizing Low Pressure Calculator

Use Plumbing Gas Pipe Sizing Low Pressure Calculator when you need to evaluate the supplied records under the calculation and evidence rules below. No compressible-flow model, installation instruction or gas safety approval is supplied.

Prepare measured flows, pressures, temperatures or inventories with consistent units. For catalog tools, use independently verified capacities at the stated operating conditions and supply the explicit design demand.

How to use Plumbing Gas Pipe Sizing Low Pressure Calculator and understand its results

Prepare measured flows, pressures, temperatures or inventories with consistent units. For catalog tools, use independently verified capacities at the stated operating conditions and supply the explicit design demand.
Enter callerLowPressureGasPipeIds, callerVerifiedMatchedGasFlowCapacityM3Hour, observedLowPressureGasDemandM3Hour using the field table and calculation rules, then run the tool.
Read callerCompatibleCandidateIds, signedCandidateCapacityMarginsM3Hour. The explanation below defines the units, signs, ordering and any flags or placeholder values.
If the tool reports an input issue, correct the values and run it again. Apply the stated assumptions when interpreting a successfully returned result.

Input field	Meaning	Value type; see rules below	Requirement
callerLowPressureGasPipeIds	Caller low pressure gas pipe ids	list of string	Required
callerVerifiedMatchedGasFlowCapacityM3Hour	Caller verified matched gas flow capacity m3 hour	list of number	Required
observedLowPressureGasDemandM3Hour	Observed low pressure gas demand m3 hour	number	Required

Enter aligned nonempty unique nonblank pipe IDs and nonnegative matched capacities, plus nonnegative demand. Return all adequate IDs and signed m³/h margins.

margin=capacity−demand; eligible=margin≥0

Units, indexing, boundary conditions and exceptional cases are defined in the calculation rules above.

Output field	Meaning	Value type
callerCompatibleCandidateIds	Caller compatible candidate ids	list of string
signedCandidateCapacityMarginsM3Hour	Signed candidate capacity margins m3 hour	list of number

json

{
  "input": {
    "callerLowPressureGasPipeIds": [
      "a",
      "b",
      "c"
    ],
    "callerVerifiedMatchedGasFlowCapacityM3Hour": [
      5,
      10,
      20
    ],
    "observedLowPressureGasDemandM3Hour": 8
  },
  "output": {
    "callerCompatibleCandidateIds": [
      "b",
      "c"
    ],
    "signedCandidateCapacityMarginsM3Hour": [
      -3,
      2,
      12
    ]
  }
}

Limitations and assumptions

No compressible-flow model, installation instruction or gas safety approval is supplied.

Numeric inputs, where present, must be finite. Follow the calculation-specific rules for overflow, underflow and exceptional cases. Numeric lists are limited to 10,000 entries; string lists to 128 strings of at most 128 characters each. The rules above may impose smaller limits. Missing required fields, extra fields, wrong value types and violations of the calculation rules are input errors.

Alternative or Complementary methods

Use Plumbing Gas Pipe Btu Capacity Calculator: A matched gas-pipe length table gives input-energy capacity for a particular assembly. Appliance demand must use input rather than useful output. For a complementary task, use Plumbing Gas Regulator Capacity Calculator: Regulator capacity varies with absolute inlet pressure under matched gas and outlet conditions. A verified calibration supports in-range interpolation.

References

Plumbing Gas Pipe Sizing Low Pressure Calculator — tool.io

Similar or alternative tools

Plumbing Gas Pipe Btu Capacity Calculator
A matched gas-pipe length table gives input-energy capacity for a particular assembly. Appliance demand must use input rather than useful output.
Plumbing Gas Regulator Capacity Calculator
Regulator capacity varies with absolute inlet pressure under matched gas and outlet conditions. A verified calibration supports in-range interpolation.