FIRE PROTECTION
Fire protection pipe OD, wall, and ID
AS 1074 Light • Medium • Heavy • SS • CPVC
AS 1074 Light • Medium • Heavy • SS • CPVC
v2.33
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| Size | OD | Wall | ID |
|---|
Steel is AS 1074-1989 (R2018) Cl 2.3, Table 2.1 Light, Table 2.2 Medium, Table 2.3 Heavy (ISO 65 / BS 1387 dimensions, mill OD). DN 65 / 125 / 150 ODs are 76.1 / 139.7 / 165.1 mm — not ASME 73.0 / 141.3 / 168.3. AS 1074 is DN 8–150; DN 90 is mill 3½″ (101.6 mm OD). DN 200 / 250 are mill fire pipe on the same ISO OD series (Light 4.8 mm, Medium 6.4 mm, Heavy Sch 40 wall). SS 10S / SS 40S stay ASME B36.19 (ASTM A312) — stainless 2½″ is still 73.0 mm OD. CPVC is SDR 13.5 (ASTM F442). Steel C=120, stainless and CPVC C=150 from AS 2118.1:2017 Cl 14.10. Confirm against the mill cut sheet before you cut or calc.
| inHg | L/s | L/min | m/s |
|---|
20T is single-mount 3/8″ and 21T is dual-mount 3/8″ (both 9.53 mm). K comes from the medium steel card Rev 03: DN50 0.638, DN65 0.617, DN80 0.665, DN90 0.661, DN100 0.672, DN125 0.671, DN150 0.706. Light, Heavy, SS 10S, SS 40S (ASME Sch 40 ID), and copper interpolate that K against mill ID. Sizes bigger than DN150 hold the DN150 K. 3/8″ still uses Diamond II 15/16 formula K. Type a K to match a different card; Use probe K puts the table/formula back. Type flow (L/min) and the table highlights the next 0.5 inHg up (1.2 → 1.5). Range is 0.5–30 inHg. Type inHg to see the flow. Steel IDs are AS 1074-1989 (R2018) Cl 2.3, Tables 2.1–2.3 Light / Medium / Heavy. Use the laminated chart that shipped with the probe for a certified test.
| DN | OD | PCD | n | Hole | Bolt |
|---|
AS 2129-2000 Table D (~700 kPa), Table E (~1400 kPa), Table F (~2100 kPa), Table H (~3500 kPa). Table D and E often share OD/PCD on small sizes; from about DN90/100, Table E has more bolts and/or is thicker — they do not always mate. ANSI / ASME B16.5 Class 150 and 300. PN16 is EN 1092-1. Field ID: count the bolts, measure OD and PCD. Confirm against the current standard before you drill or bolt up.
Enter flow (L/s) and pressure (kPa). The curve is a spline through the points. With a system duty entered, the tab and email report show PASS (green) or FAIL (red).
Curves autosave by job name. Save keeps the chart PNG. Email sends a customer report citing AS 2941-2013 Cl 10.3 (shop performance), AS 2419.1:2021 Cl 4.2.7.1.2 (residual pressure), AS 2118.1:2017 Cl 14.9 (sprinkler pumpsets) and AS 1851-2012 Table 3.4.3 (yearly performance), with the curve attached. Field record — not a certified lab curve.
Autosaved pump curves. Open one to load it back onto this page.
Calcs autosave by site / job. Save keeps the A4 report PNG. Email sends that PNG with the customer report.
Autosaved hydro calcs. Open one to load it back onto this page.
Hazen-Williams friction plus 9.81 kPa per metre of rise. Elbows use 90° equivalent length from fire hydraulic tables (AS 2118.1:2017 Cl 14.10 / 14.11). Steel default C=120, stainless and CPVC C=150 (AS 2118.1:2017 Cl 14.10). Velocity above 5 m/s is a field FAIL (red); within 5 m/s is PASS (green). That 5 m/s is a typical project limit — AS 2118.1-1999 Cl 12.14 allows 10 m/s in pipe and 6 m/s at valves. Email cites AS 1074-1989 (R2018) Cl 2.3 Tables 2.1–2.3, AS 2118.1:2017 Cl 14.10 and AS 2419.1:2021 Cl 4.2.7.1.2. Field estimate — not a certified hydraulic design.
Calcs autosave by site / job. Save keeps the A4 report PNG. Email sends that PNG with the customer report.
Autosaved tank calcs. Open one to load it back onto this page.
Pick 1 to 4 tanks. Effective capacities add. Infill is the combined make-up into the bank. Gross = full internal volume of the shell. Effective = volume between the usable high water (overflow minus air gap, default 20 mm per AS/NZS 3500.1:2021 Cl 8.3.2 — water surface 20 mm below overflow) and the usable low water (above suction / vortex inhibitor, default 150 mm — typical field plate height; confirm AS 2304:2019 Cl 7.3.5 vortex inhibitor and Cl 7.5 capacities; enter the actual plate height). Overflow fittings: AS 2304:2019 Cl 7.3.6. Hydrants need 4 h at demand (AS 2419.1:2021 Cl 4.2.1 primary supply and Cl 4.2.6.3 full-capacity tanks). Sprinklers need 30 min Light (AS 2118.1:2017 Cl 9.3), 60 min Ordinary (Cl 10.3), 90 min High Hazard (Section 11). Infill is credited as make-up: duration uses combined effective litres ÷ (demand − infill). Combined hydrant + sprinkler storage is checked for hydrants, sprinklers, and both running together (AS 2419.1:2021 Cl 4.2.3 multiple firefighting systems). Enough storage is a green PASS; short is a red FAIL on the tab and on the email report. Email cites those clauses. Field estimate — confirm on the current Standard.
AS 1851-2012 (plus Amendment 1:2016) is the Australian Standard for routine service of fire protection that is already installed. It is not the design/install Standard. Sprinklers are designed to AS 2118.1, hydrants to AS 2419.1, pumps to AS 2941, tanks to AS 2304, detection to AS 1670, hose reels to AS 2441, and so on. AS 1851 tells you how often to come back, what to look at, what to test, and what to write down so the installed system still works the way it was designed.
Routine service has four parts: inspect (look and compare to last time / baseline), test (prove it actually works — alarm, flow, pump start, trip), preventative maintenance (batteries, fuel, grease, clean, replace consumables), and survey (does this system still match the building — occupancy, storage, missing heads, blocked hydrants).
How visits stack. A yearly visit includes the monthly and six-monthly items, then the extra yearly work. A five-yearly visit includes the yearly work plus a deeper survey / internal / overhaul set. The owner may run monthly items weekly. Work is done by a competent person for that system type, and results go in the logbook (pressures, defects, isolations, who did the work). Five-yearly surveys need baseline data: as-installed drawings, pump curves, tank levels, head types.
Frequencies used across the Standard: monthly, 3-monthly, 6-monthly, yearly, 2-yearly, 5-yearly, then 10 / 25 / 30-yearly where listed. Table 1.11(B) tolerances (so a visit is not late/early by accident): monthly ±5 working days · 3-monthly ±10 working days · 6-monthly ±1 month · yearly ±2 months · 5-yearly ±3 months · 10/25/30-yearly ±6 months.
Pick a system and frequency below, or search (pump monthly, hydrant flow, damper, tank internal). Cards are a field memory aid of typical checks — not a copy of the copyrighted tables. Confirm the exact item and pass/fail in the current Standard on site.
Field lookup for AS 1851-2012 (incl. Amdt 1:2016). This is not the Standard and not a substitute for the current published document. Confirm the exact table item and pass/fail on site.
Door-fan enclosure integrity for gaseous fire suppression. Leakage is fitted from the fan points the same way as the Sky Aus UPS Room sheet: correct each room pressure by the test bias, then fit ln(flow) against ln(pressure). Hold time uses ISO 14520-1 Annex E. The 2015 setting uses that edition’s equivalent sharp-interface height; the 2006 setting uses the earlier interface height. AS ISO 14520 is the Australian adoption of ISO 14520. AS 1851-2012 requires room integrity testing of installed gaseous systems. This sheet’s acceptance, and the usual gaseous-agent retention, is 10 minutes. Carbon dioxide is not in this agent list. Agent densities, design and extinguishing concentrations, and the k1/k2 specific-volume constants are the parameters on that sheet. Halocarbon vent areas use its FM-200 and Novec discharge equations (safety factor 1.2, vent efficiency 100%, relative humidity 38%). Inert vent area is its mass-flow estimate. Field estimate. Confirm the current standard and the system design before sign-off.