Line List
Template (Excel)

A piping line list is the master register of every process and utility piping line on a project. For each line it records line number, from / to equipment tags, P&ID reference, service fluid, nominal size, schedule, piping material spec class (PMS), applicable code (ASME B31.3 for process piping, B31.1 for power, B31.4 for liquid pipelines, B31.8 for gas transmission, EN 13480 for European process piping), design and operating pressure / temperature, insulation, tracing, PWHT and NDE requirements, test medium and pressure, and IBR scope for Indian power piping. It is a mandatory EPC deliverable.

Required columns: line number per project line-numbering scheme, from / to equipment tags or line-end references, P&ID reference with sheet and revision, service fluid, nominal size, schedule, PMS class, applicable code, design and operating pressure / temperature, insulation code and thickness, tracing type, PWHT requirement, NDE percentage, test medium, test pressure. For Indian PSU scope add an IBR Scope flag for boiler-side piping under Indian Boiler Regulations. The template includes all required columns plus optional revamp Scope and cleanliness class columns.

Pathnovo, an engineering document intelligence platform, extracts every line number annotation, line-end equipment tag, and PMS class reference from your P&IDs. It cross-references the piping material spec PDFs to populate material, schedule, and NDE requirements per PMS. Typical project turnaround is 48 hours for the initial batch with 99.5% contractual accuracy on safety-critical fields. Output is configurable to your EPC template format. See the P&ID extraction workflow for the full pipeline.

ASME B31.3 (Process Piping) applies to process piping in refineries, petrochemicals, fertilizer, gas processing, and chemical plants. ASME B31.1 (Power Piping) applies to power plant steam, condensate, and feedwater piping within the steam cycle. ASME B31.4 covers liquid pipelines (crude, refined products, anhydrous ammonia) outside plant battery limits. ASME B31.8 covers gas transmission and distribution. EN 13480 covers European process piping as an alternative to B31.3. The line list Code column captures the applicable code per line; downstream NDE, PWHT, and inspection scope all flow from the Code designation. See the ASME B31.3 standard reference.

The line list is the parent register; isometric drawings (one per line, generated per ASME Y14.5 or ISO 6411) are the child detail; the piping MTO (material take-off) is the aggregated material total extracted from the isometrics. Project lifecycle: line list is issued at IFA in FEED, isometrics are issued at IFC during detailed engineering, MTO is generated from issued isometrics for procurement. Pathnovo handles all three workflows in sequence. See the piping MTO extraction workflow.

It must include both. Utility piping (instrument air, plant air, nitrogen, steam, condensate, cooling water, firewater, fuel gas, drain) is governed by the same applicable code (typically ASME B31.3 for process plants) and requires the same line list columns. Industry practice is to either keep both on one combined line list with a Service column flag, or maintain two parallel registers (process line list and utility line list) with the same column structure. The template supports either pattern.

Indian Boiler Regulations (IBR) cover power piping connected to boilers above specified pressure and temperature thresholds. For IBR-scoped lines, the IBR Scope column flags 'Yes' and a separate IBR Form IV register is maintained tracking certification, Chief Inspector of Boilers stamping, and routine inspection. NDE and PWHT requirements escalate per IBR rather than ASME B31.1. The template IBR Scope column drives the cross-reference to the IBR register. See the IBR compliance workflow.