{
  "ftaDoc": {
    "version": "5.0",
    "standard": "IEC61025",
    "savedAt": "2026-03-10T03:38:07.486135Z"
  },
  "projects": [
    {
      "id": "pc6b29d5d",
      "name": "Oil & Gas \u2014 Pipeline",
      "expanded": true,
      "settings": {
        "description": "Process safety fault tree for loss of primary hydrocarbon containment from pipeline or process system. Addresses pipeline integrity failure, overpressure rupture, and joint/fitting failure. Developed per IEC 61511, API RP 754, PSSR 2000. SIL 2 target for SIS protection layer.",
        "organization": "FTA Studio Template Library",
        "analyst": "",
        "revision": "A",
        "standard": "IEC61025",
        "silTarget": "SIL2",
        "missionTime": 8760,
        "anaMethod": "exact",
        "sciNotation": true
      },
      "ftas": [
        {
          "id": "f4e177c6e",
          "name": "Uncontrolled Hydrocarbon Release",
          "nodes": [
            {
              "id": "n663edd13",
              "uid": "TOP-001",
              "ntype": "top",
              "gateType": "OR",
              "name": "Uncontrolled Release of Hydrocarbon",
              "desc": "Loss of primary containment of hydrocarbon from pipeline or process equipment. Ref: IEC 61511, PSSR 2000, API RP 754. Tier 1/2 Process Safety Event.",
              "outputId": null,
              "refId": null,
              "prob": null,
              "lambda": null,
              "mu": null,
              "missionTime": 8760,
              "sil": null,
              "failureMode": "",
              "detection": "",
              "hazards": [],
              "evidence": "",
              "mitigation": "",
              "severity": null,
              "occurrence": null,
              "detectability": null,
              "x": 580.0,
              "y": 80
            },
            {
              "id": "n7c4ac588",
              "uid": "G-001",
              "ntype": "gate",
              "gateType": "OR",
              "name": "Pipeline Integrity Failure",
              "desc": "Failure of pipeline wall or joints causing loss of containment.",
              "outputId": "n663edd13",
              "refId": null,
              "prob": null,
              "lambda": null,
              "mu": null,
              "missionTime": 8760,
              "sil": null,
              "failureMode": "",
              "detection": "",
              "hazards": [],
              "evidence": "",
              "mitigation": "",
              "severity": null,
              "occurrence": null,
              "detectability": null,
              "x": 20.0,
              "y": 250
            },
            {
              "id": "na628461c",
              "uid": "BE-001",
              "ntype": "basic",
              "gateType": null,
              "name": "External corrosion \u2014 wall penetration",
              "desc": "External corrosion of uncoated or coating-defect area reducing wall to failure.",
              "outputId": "n7c4ac588",
              "refId": null,
              "prob": null,
              "lambda": 5e-06,
              "mu": null,
              "missionTime": 8760,
              "sil": null,
              "failureMode": "Pinhole leak or rupture",
              "detection": "Periodic ILI (intelligent pigging), CP monitoring",
              "hazards": [],
              "evidence": "",
              "mitigation": "External coating system; cathodic protection; ILI schedule",
              "severity": null,
              "occurrence": null,
              "detectability": null,
              "x": -220.0,
              "y": 420
            },
            {
              "id": "nef1706b3",
              "uid": "BE-002",
              "ntype": "basic",
              "gateType": null,
              "name": "Internal corrosion / erosion wall loss",
              "desc": "Internal corrosion from H2S/CO2/water or erosion from solids/high velocity.",
              "outputId": "n7c4ac588",
              "refId": null,
              "prob": null,
              "lambda": 3e-06,
              "mu": null,
              "missionTime": 8760,
              "sil": null,
              "failureMode": "Thinning to below minimum",
              "detection": "Corrosion probes; chemical injection records; ILI",
              "hazards": [],
              "evidence": "",
              "mitigation": "Corrosion inhibitor injection; flow velocity control; ILI",
              "severity": null,
              "occurrence": null,
              "detectability": null,
              "x": -60.0,
              "y": 420
            },
            {
              "id": "ncddecd67",
              "uid": "BE-003",
              "ntype": "basic",
              "gateType": null,
              "name": "Third-party mechanical damage",
              "desc": "Excavation or ground movement by third party striking pipeline.",
              "outputId": "n7c4ac588",
              "refId": null,
              "prob": null,
              "lambda": 1e-05,
              "mu": null,
              "missionTime": 8760,
              "sil": null,
              "failureMode": "Puncture or severing of pipe",
              "detection": "One-call / permit-to-dig system; pipeline markers",
              "hazards": [],
              "evidence": "",
              "mitigation": "Depth of cover; concrete slabs; pipeline awareness programme",
              "severity": null,
              "occurrence": null,
              "detectability": null,
              "x": 100.0,
              "y": 420
            },
            {
              "id": "n3b07da74",
              "uid": "BE-004",
              "ntype": "basic",
              "gateType": null,
              "name": "Stress corrosion cracking (SCC)",
              "desc": "High-pH or near-neutral pH SCC in pipeline steel, typically at coating holidays.",
              "outputId": "n7c4ac588",
              "refId": null,
              "prob": null,
              "lambda": 2e-06,
              "mu": null,
              "missionTime": 8760,
              "sil": null,
              "failureMode": "Sudden brittle fracture",
              "detection": "SCC-specific ILI tool; DCVG survey",
              "hazards": [],
              "evidence": "",
              "mitigation": "Pressure cycling management; SCC-resistant steel grades",
              "severity": null,
              "occurrence": null,
              "detectability": null,
              "x": 260.0,
              "y": 420
            },
            {
              "id": "n49d4f40a",
              "uid": "G-002",
              "ntype": "gate",
              "gateType": "AND",
              "name": "Overpressure Rupture",
              "desc": "Pressure exceeds design AND all protection systems fail.",
              "outputId": "n663edd13",
              "refId": null,
              "prob": null,
              "lambda": null,
              "mu": null,
              "missionTime": 8760,
              "sil": null,
              "failureMode": "",
              "detection": "",
              "hazards": [],
              "evidence": "",
              "mitigation": "",
              "severity": null,
              "occurrence": null,
              "detectability": null,
              "x": 660.0,
              "y": 250
            },
            {
              "id": "nb9ad5b38",
              "uid": "G-003",
              "ntype": "gate",
              "gateType": "OR",
              "name": "Pressure Exceedance Cause",
              "desc": "Initiating event causing pipeline pressure to exceed MAOP.",
              "outputId": "n49d4f40a",
              "refId": null,
              "prob": null,
              "lambda": null,
              "mu": null,
              "missionTime": 8760,
              "sil": null,
              "failureMode": "",
              "detection": "",
              "hazards": [],
              "evidence": "",
              "mitigation": "",
              "severity": null,
              "occurrence": null,
              "detectability": null,
              "x": 500.0,
              "y": 420
            },
            {
              "id": "nadf14cf1",
              "uid": "BE-005",
              "ntype": "basic",
              "gateType": null,
              "name": "Compressor station surge event",
              "desc": "Centrifugal compressor surge generating pressure transient exceeding pipeline design.",
              "outputId": "nb9ad5b38",
              "refId": null,
              "prob": null,
              "lambda": 2e-05,
              "mu": null,
              "missionTime": 8760,
              "sil": null,
              "failureMode": "Surge pressure wave propagates downstream",
              "detection": "Antisurge controller; discharge pressure high alarm",
              "hazards": [],
              "evidence": "",
              "mitigation": "Antisurge valve; station ESD on pressure exceedance",
              "severity": null,
              "occurrence": null,
              "detectability": null,
              "x": 420.0,
              "y": 590
            },
            {
              "id": "n9c603867",
              "uid": "BE-006",
              "ntype": "basic",
              "gateType": null,
              "name": "Unintended downstream isolation",
              "desc": "Unplanned closure of downstream valve trapping flowing gas.",
              "outputId": "nb9ad5b38",
              "refId": null,
              "prob": null,
              "lambda": 5e-06,
              "mu": null,
              "missionTime": 8760,
              "sil": null,
              "failureMode": "Pressure build-up in closed segment",
              "detection": "Valve position monitoring; pressure rise alarm",
              "hazards": [],
              "evidence": "",
              "mitigation": "ESD logic prevents isolation with flow; MOC for valve operations",
              "severity": null,
              "occurrence": null,
              "detectability": null,
              "x": 580.0,
              "y": 590
            },
            {
              "id": "n8149c5a4",
              "uid": "G-004",
              "ntype": "gate",
              "gateType": "AND",
              "name": "Pressure Protection System Failure",
              "desc": "Both primary and secondary pressure protection must fail.",
              "outputId": "n49d4f40a",
              "refId": null,
              "prob": null,
              "lambda": null,
              "mu": null,
              "missionTime": 8760,
              "sil": null,
              "failureMode": "",
              "detection": "",
              "hazards": [],
              "evidence": "",
              "mitigation": "",
              "severity": null,
              "occurrence": null,
              "detectability": null,
              "x": 820.0,
              "y": 420
            },
            {
              "id": "n4e11459e",
              "uid": "BE-007",
              "ntype": "basic",
              "gateType": null,
              "name": "High pressure ESD fails to trip compressor",
              "desc": "Safety Instrumented System fails to trip compressor on high-high pressure.",
              "outputId": "n8149c5a4",
              "refId": null,
              "prob": null,
              "lambda": 5e-06,
              "mu": null,
              "missionTime": 8760,
              "sil": null,
              "failureMode": "Compressor continues at elevated discharge",
              "detection": "SIL assessment proof test (IEC 61511)",
              "hazards": [],
              "evidence": "",
              "mitigation": "SIL 2 pressure shutdown per IEC 61511; 2oo3 voting",
              "severity": null,
              "occurrence": null,
              "detectability": null,
              "x": 740.0,
              "y": 590
            },
            {
              "id": "n9ce6f0cf",
              "uid": "BE-008",
              "ntype": "basic",
              "gateType": null,
              "name": "Pressure safety valve fails to open",
              "desc": "Pipeline pressure safety valve fails to open at set pressure \u2014 corrosion, deposits.",
              "outputId": "n8149c5a4",
              "refId": null,
              "prob": null,
              "lambda": 3e-06,
              "mu": null,
              "missionTime": 8760,
              "sil": null,
              "failureMode": "No relief at set pressure",
              "detection": "Annual proof test per statutory examination scheme",
              "hazards": [],
              "evidence": "",
              "mitigation": "Dual PSVs on critical segments; PSV sizing per API 520/521",
              "severity": null,
              "occurrence": null,
              "detectability": null,
              "x": 900.0,
              "y": 590
            },
            {
              "id": "nc29a7b7c",
              "uid": "G-005",
              "ntype": "gate",
              "gateType": "OR",
              "name": "Flange / Fitting Joint Failure",
              "desc": "Loss of containment at mechanical joints and sealing interfaces.",
              "outputId": "n663edd13",
              "refId": null,
              "prob": null,
              "lambda": null,
              "mu": null,
              "missionTime": 8760,
              "sil": null,
              "failureMode": "",
              "detection": "",
              "hazards": [],
              "evidence": "",
              "mitigation": "",
              "severity": null,
              "occurrence": null,
              "detectability": null,
              "x": 1140.0,
              "y": 250
            },
            {
              "id": "n8e838470",
              "uid": "BE-009",
              "ntype": "basic",
              "gateType": null,
              "name": "Flange gasket failure",
              "desc": "Spiral wound or ring-type joint gasket failure from overtorque, thermal cycling or chemical attack.",
              "outputId": "nc29a7b7c",
              "refId": null,
              "prob": null,
              "lambda": 4e-06,
              "mu": null,
              "missionTime": 8760,
              "sil": null,
              "failureMode": "Flange leak \u2014 joint face separation",
              "detection": "Gas detector, visual inspection",
              "hazards": [],
              "evidence": "",
              "mitigation": "Torque verification; correct gasket material selection",
              "severity": null,
              "occurrence": null,
              "detectability": null,
              "x": 1060.0,
              "y": 420
            },
            {
              "id": "n21108de6",
              "uid": "BE-010",
              "ntype": "basic",
              "gateType": null,
              "name": "Valve stem packing / seal leak",
              "desc": "Valve stem dynamic seal deterioration leading to fugitive emission or blowout.",
              "outputId": "nc29a7b7c",
              "refId": null,
              "prob": null,
              "lambda": 2e-06,
              "mu": null,
              "missionTime": 8760,
              "sil": null,
              "failureMode": "Stem seal weeping or blowout",
              "detection": "Fugitive emission monitoring (Method 21); sniffer survey",
              "hazards": [],
              "evidence": "",
              "mitigation": "LDAR programme; low-emission valve design (ISO 15848)",
              "severity": null,
              "occurrence": null,
              "detectability": null,
              "x": 1220.0,
              "y": 420
            }
          ],
          "cam": {
            "x": 360,
            "y": 40,
            "zoom": 0.72
          },
          "analysis": null,
          "ccfGroups": [],
          "disjointGroups": [],
          "diagramPages": [],
          "seqId": 1
        }
      ],
      "eventLibrary": []
    }
  ],
  "_id": 200,
  "_uid": {},
  "ccfGroups": []
}