Guides & Charts

Which blowtorch for soldering copper pipe?

For 15 and 22 mm capillary joints a butane EN417 cartridge torch with a soldering nozzle is enough - flame shape beats power. When 28 mm work needs oxy-fuel.

Brazing nozzle sizes explained

What brazing nozzle numbers mean, how to match a size to your job, and how brazing nozzles differ from welding nozzles. Charts included.

Oxy-acetylene welding nozzle numbers: No. 1-25 explained

The British acetylene welding nozzle numbering runs No. 1-25. Learn what the number means, which size welds which thickness, and how to verify before you fit.

Rothenberger Superfire 2: finding the right replacement burner

Burner worn, flame ragged, torch not lighting? Identify the right Superfire 2 spare or repair part, fit it safely, and see what fits Quickfire and Roxy.

How to clean a clogged torch nozzle

Ragged yellow flame? Sooting nozzle? Clean it the right way: pick the correct wire size, clear the orifice without enlarging it, and know when to replace.

Which cartridges are EN417, and what fits them?

What EN417 compliant means: the standard covers the cartridge and valve, not torch performance. Check the seat and confirm fit before ordering.

Butane vs propane torches: what changes at the bench

Propane in air generally burns hotter than butane, but cold weather and heat delivery matter at work. Compare flame heat, wind, cost and cartridge fit.

Soldering vs brazing: which one does your joint need?

Where soldering ends and brazing begins: the temperature convention, joint strength, filler form, flux needs, and the torch each one asks for.

Torch nozzle seats: why the same size number does not always fit

Why a No.5 from one torch will not seat in another: seat families explained by concept, what a wrong seat costs, and how to confirm a fit.

Why your torch flame turned yellow (and what to check first)

A yellow flame means the gas is not burning cleanly - usually the cartridge, the air mix or a dirty nozzle. Check them in this order and fix it in minutes.

Tradeflame aluminium brazing rods: what to check before you buy

Tradeflame aluminium 4043 rods: 2 mm diameter, 574-632°C working range and 4-pack reference. Check the job or ask TorvPro for an alternative quote.

How to choose a brazing rod for the metal in front of you

Choosing a brazing rod starts with the parent metal, not the torch. How to match rods to aluminium, copper and mixed-metal joints on an air torch.

Blowtorch safety checks before you light it

Practical blowtorch safety checks: seal testing without a flame, ventilation, clearances, eye and hand protection, cool-down, cartridge storage and disposal.

How to solder copper pipe with a blowtorch, step by step

Clean, flux, heat the fitting, feed the solder: the full capillary joint sequence for 15 and 22 mm copper pipe, plus the five mistakes that ruin joints.

How to braze aluminium with a torch: rods, flux and flame control

Low-temperature aluminium brazing with a cartridge or propane torch: rod choice, oxide control, flux, and the joints this process can and cannot handle.

Sievert blowtorch spares: matching the right replacement burner

Burner worn on a Sievert Promatic, Turbo or Pro hand torch? Identify the right replacement burner by series and stamp - fit confirmed before you order.