How does a Trichy boiler parts fabricator count the steel plate and tube it buys?
As Scope 3 category 1, purchased goods: tonnes of plate and tube times a supplier-specific factor, or a route average if none is given. Your own Scope 1 covers stress relieving furnaces and cutting gases; welding power is Scope 2.
Purchased steel
- Total tonnes of plate, tube and sections bought, from invoices.
- A factor per tonne from each mill, or a published route average.
- Multiply and add up by supplier.
Your own sources
- Fuel for stress relieving and heat treatment furnaces.
- LPG and other gases for cutting and preheating.
- Electricity for welding and machining, as Scope 2.
When a customer asks for a product figure
Share the steel by the weight that goes into each job, add your process emissions per job, and allow for offcuts that are sold as scrap.
What Senseible does here
Senseible reads supplier invoices into dated, fingerprinted records, so each purchased material in a Scope 3 figure traces back to its document.
Sources: GHG Protocol Corporate Value Chain (Scope 3) Standard, GHG Protocol Corporate Standard, worldsteel
Last reviewed 2026-10-22.