SAFETY IN OXYFUEL PROCESSSOUMEN DEB

9TH AUGUST 2018

WELCOME

Safety Symposium &

Exposition 2018, Kolkata

SAFETY & SECURITY

Safety In Oxyfuel process like Gas

welding cutting Brazing Heating

Oxyfuel Heating process

LPG & O2 CYLINDER BLAST

HIMANSHU ENGINEERING WORKS

YAMUNA NAGAR

August 7, 2006

Gases In Use..Oxygen

Acetylene

LPG/Propane

Flame Temperatures 2800 to 3100

Gas Density

“Heavy” gases flow

like liquids

Explosion Limits

LEL (vol %) UEL (vol %)

Acetylene C2H2 2,8 93

Ammonia NH3 15 28

Arsine AsH3 4 10

Butane C4H10 1,8 8,5

Natural Gas (Methan) CH4 5 15

Ethylene Oxyde C2H4O 3 100

Hydrogen H2 4 75,6

Gas

Explosion Limits

Case Study - Cochin Ship yard

COCHIN SHIPYARD FEB 2018

OXYFUEL GAS FLASHBACK ARRESTORS

Loud noise caused by

momentary stoppage of gas flow

=> Resulting in momentary extinguishment and reignition of the flame

Cause : due to

obstruction by an

overheated or

damaged tip

Burning back of flame into torch tip or gas hose

Causes :

Improper gas press. settings

Distorted or loose tips

Damaged seats

Kinked hoses

Incorrect Nozzle Selection

Clogged or damaged tips

Improper gas supply

Gas Mixing ratio

Backfire Flashback

OXY-FUEL EQUIPMENT – THE TECHNOLOGY IN FLASHBACK ARRESTORS FLASHBACK ARRESTOR MODEL “DGN”

Inlet Gas non- Flame arrestor Temperature-

filter return valve sensitive

cut-off valve

FBA – DGN , ACTUAL CUT VIEW

TYPES OF FLASHBACK ARRESTORS

USES OF 2 PIPE CUTTING TORCHES

FLASHBACK BLAST AT TORCH HANDLE- 2 PIPE TORCH

UNSAFE PRACTICE IN OXYFUEL CUTTING : USES OF 2 PIPE CUTTING TORCH

UNSAFE 2 PIPE TORCH AND VIEW OF FLASHBACK BURST 3 PIPE CUTTING TORCH – THE SAFE ONE

CYLINDERS OUTSIDE THE PLANTS

ACETYLENE GAS BANK WITH ÄSG” SAFETY DEVICE FITTED AT JSPL - RAIPUR

THE TECHNOLOGY :

BU13 – 2X10 OXYGEN GAS BANK @ JSPL RAIPUR

WITH SAFETY INSTRUCTION BOARDS

NITROGEN MANIFOLD HEADER

ECONOMICAL WITH TORNADO

300 & F11 FILTER

HOWDEN SOLYVENT

TAPPING POINT REGULATORS – ET65 WITH

BALL VALVE & SS BACK UP PLATE

THE GREY-MATTER TECHNOLOGYApplication Usage

Training

Ownership

Monitoring

Awareness & Assessment

Thank you