Gas Line-Pack Decay & Repressurization
Line-pack inventory between MAOP and a minimum delivery pressure, the drawdown time supplying demand during a supply outage, and the repressurization time to restore MAOP. Per real-gas line-pack / AGA Report No. 8.
Pipeline
km
in
in
psig
psig
Gas & Rates
°F
MMscfd
MMscfd
Engineering Basis
Line pack Vstd = Vpipe·(Ppsia/14.696)·(519.67/TR)·(1/Z) — shut-in uniform pressure.
Deliverable = pack(MAOP) − pack(Pmin).
Decay time = deliverable / outage demand; repressurization = deliverable / net inflow.
Standards: Real-gas line-pack (first principles); Z per AGA Report No. 8.