Domestic Gas Pipework:

Stoichiometry

Type, Copper, Steel, PE, Trac Pipe

No Lead, no plastic pipework 400Cmelting, solder, threaded, compression, PE outside, Metal inside fire proof. No dissimilar metals in clippingor pipework. CV energy 1040btu/ft³Copper, Steel, Trac Pipe No Lead, no plastic pipework. Metal inside fire proof. No dissimilar metals leading to electrolysis. Ducted CSA <0.01m² no vent, High vented is 0.05m² same as duct CSA,

Main Earth Bonding downstream 600mm, Temp Bonding

Before the first T or branch, seperation min 25mm/50mm for over 35mmF, gas/electric supply 150mm apart. Temp bonding Clamp UD/DU, LR/RL, never both together. Meter, away from food storage, hazardous. Made from 1.5mtrs of 10mm2 with clamps, Prevents electrical shock facilitates electrical earth continuity, to be used across any metal pipework, removing meters or pipe sections.

Adequate Size for Installation

Up to 35mm², branch sizes, under sizing ID, U6 0.008m³, U16, 0.025m³, 170kW. Boiler 24kW/9.71, 2.47m³, fire 5.5kW/, pressures inlet 75mb-regulator-21, 19-23, pipework only no drop, working pressure 20mb, 1mb drop across pipework. Up to 35mm², 15mm 6kW, 22mm 18kW, 28mm 30kW, 35mm 45kW. Gas pressure 19-23, Pipework only no drop, working pressure 20mb, 1mb drop across Pipework.

Adequate Clipping arrangement

Distances Horizontal, Vertical distances, Closed to secure pipe. Wrapover clips only to secure the pipes to the surfaces, Correct Horizontal, Vertical distances.

Location round dwelling inside, outside

Outside Pipe runs not in line with Flues, not in risers, fire stops, H Vents table.

Protection of pipework in dwelling.

Through walls Sleeving/sealed inside both ends, outside just sleeve, with fire proof mastic/silicone, intumescent EN1366-3 putty. Must be of the same material. Gas pipe sealed inside the property. Covered for corrosion protection. Accessible ECV. Outside Pipe runs not in line with Flues, not in risers, install fire stops, H Vents table.

Appropriate fittings throughout, BS, 1986 act

From meter to the appliances isolation valve, gas isolation has a stop indicating it is closed as water has a 360deg rotating handle. Solder melting point is 400C. Fittings are threaded, Yorkshire, End Feed capillary, compression with olive glands. Yellow PE is used for outside by Transco buried. Copper, Brass, Steel, elbow range, couplers, crossover, end caps, bayonet, threaded pipe adapters,

No open ends, Speed fit, compression joints

Isolation valve, Restrictor not capped off, all visible, plastic capoff.

Flexible Pipe not flued appliances

Not permitted on fixed flues, flueless cooker, tumble dryer for cleaning, host type AR!!

Pipework Air Test for tightness, IGE/UP/1B.

Sample Frame, Coupler-back nut repair no new fitting, Parallel/Tapered thread, Hemp, balance the U gauge when connected.

Installation Tightness Testing, gas containment

IGE/UP/1B, 4-minute test let-by funding a leak. LDF joints, 1mb max drop, MOP lockup controls, Test valve missing NG, remove handle after test,

Pipework coating after installation completion

Not to be done before tightness testing, 15mm 6kW, 22mm 18kW, 28mm 30kW, 35mm 45kW.

System Purge removing air from the system

Meter PV U6/E6/G4 28mm, Metric 0.01m³, Imperial 0.355, 3 ½ divisions, 5 x 0.071 cycles. >0.02 flame off. U6/G4 >28mm 0.01+1.5 x pipe IV, E6 >28mm 0.0036+1.5 x pipe IV. U16/G10 0.03+1.5 x pipe IV.G10 PV 0.05m³

Pressures round the System

Standing, Working, Burner Pressure, Losses, Gas Rate. Manometer zeroed,

Basic Tool Kit

Pipe cutters, 15/22mm, Blow torch, Heat Mat, Heat Gloves, Pipe cleaner, Flux, Plumbers Solder, PPE, Masonry SDS 30mm type 2 for 28mm sleeving, and SDS 25/32mm Max 4, parallel shaft bits and a pilot hole, small diameter bit. LDF, Manometer, Screwdrivers, Meter and compression fitting spanners, Mole grips, SDS 700W drill, Screws, Plugs and masonry drill bit, medium drill battery/mains, Portable work bench, Meter caps,