IPIQ

MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING

F23

COMBUSTION APPARATUS; COMBUSTION PROCESSES

F23J

REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES

2213/00

Chimneys or flues

F23J2213/20

Joints; Connections

F23J2213/201

between stack and branch pipes