EXHIBIT 21.1
<Table>
Arcair Stoody Europe S.A. (Belgium) Marison Cylinder Company
Europa Building 101 South Hanley Road, Suite 600
Chorley North Industrial Park St. Louis, MO 63105
Drumhead Road
Chorley Lancashire PR6 7BX England Maxweld & Braze Pty. Ltd.
9 First Street
C&G Systems, Inc. Boksburg North
1401 Glenlake Boksburg, South Africa
Itaska, IL 60143 Stand #471 B14
C&G Systems Holding, Inc. MECO Holding Company
101 South Hanley Road, Suite 600 101 South Hanley Road, Suite 600
St. Louis MO 63105 St. Louis, MO 63105
Canadian Cylinder Company Metalservice S.A.
2220 Wyecroft Road Piloto Lazo #90 Cerillos
Oakville, Ontario Santiago, Chile
Canada L6L 5V6
Modern Engineering Company, Inc.
Comet Property Holdings Limited Unit 65, US Highway I-55 South
Accra Bldg. 122 Gamboa Street Gallman, MS 39077
Lagaspi Village
Makati City, Philippines O.C.I.M. S.r.l.
Via Benaco, 3
Comweld Group Pty Ltd. S. Giuliano Milanese (MI)
85 Chifley Drive Milan, Italy 20098
Preston Victoria, 3072
Australia Palco Trading Company
P.O. Box 34 - 35
Comweld Malaysia Sdn. Bhd. Dubal, UAE
Lot 151, Rawang Integrated Industrial Park
Jalan Batu Arang Philippine Welding Equipment, Inc.
48000 Rawang Ground Floor, PWE Bldg.
Selangor Darul Ehsan North Road Jagobiao
West Malaysia Mandaue City
Cebu, Philippines
Comweld (Philippines) Inc.
85 Chifley Drive PT Comweld Indonesia
Preston Victoria 3072 Kawasan Industri Jababeka
Australia JI Jababeka VI Block P No. 3
Cikarang, Bekasi 17550
Coyne Natural Gas System, Inc. Indonesia
101 South Hanley Road, Suite 600
St. Louis, MO 63105 PT Thermadyne Utama Indonesia (f/k/a PT Catu...)
Kawasan Industri Jababeka
Duxtech Pty Ltd. JI Jababeka VI Block P No. 3
85 Chifley Drive Cikarang, Bekasi 17550
Preston Victoria 3072 Indonesia
Australia
Quetack Pty Ltd.
GENSET SpA 85 Chifley Drive
Thermadyne Italia S.P.A. fka PALCO, Italia S.P.A. Preston Victoria 3072
Via Stazione 5 Australia
Villanova d'Ardenghi
Pavia 27030 Italy
</Table>
EXHIBIT 21.1
<Table>
Quetala Pty Ltd. Thermadyne China (Shanghai)
85 Chifley Drive Room 102A
Preston Victoria 3072 685 Dingxi Road
Australia Changning District
Shanghai 200052
Quetala Unit Trust P.R. China
85 Chifley Drive
Preston Victoria 3072 Australia Thermadyne Cylinder Co.
2220 Wyecroft Road
Soltec S.A. Oakville, Ontario
Piloto Lazo #90 Cerrillos Canada L6L 5V6
Santiago 7278654 Chile
Thermadyne de Mexico S.A. de C.V.
Stoody Company Francisco del Paso y Troncoso 869
5557 Nashville Road Col Los Reyes
Bowling Green, KY 42101 Mexico City, Mexico 08620
TAG Realty Thermadyne do Brasil Ltda
101 South Hanley Road, Suite 600 Rau Marechal Deodro 597
St. Louis, MO 63105 Vila Paulo Apto 121
Sao Caetano Do Suls 09541300
TEC.MO. S.r.l.
Via Rio Fabbiani, 8 Thermadyne Foreign Sales Corporation (Barbados)
40067 Rastignano c/o Price Waterhouse Corporate Services
Bologna, Italy Price Waterhouse Centre
Collymore Road, St. Michael, Barbados
Thermadyne Asia/Pacific PTE Ltd.
UE Tech Park #02-03 Thermadyne Holding Corp.
8 Pandane Crescent 101 S. Hanley Road, Suite 600
Singapore 128464 St. Louis, MO 63105
Thermadyne Asia SDN BHD (Malaysia) Thermadyne Industries, Inc.
Lot 151, Rawang Integrated Industrial Park 101 South Hanley Road, Suite 600
Jalan Batu Arang St. Louis, MO 63105
48000 Rawang
Selangor Darul Ehsan Thermadyne Industries Limited (UK)
West Malaysia Europa Building
3 Chorley North Industrial Park
Thermadyne Australia Pty Ltd. Chorley Lancashire PR6 7BX England
85 Chifley Drive
Preston Victoria 3072 Thermadyne International Corp.
Australia 2070 Wyecroft Road
Oakville, Ontario
Thermadyne Brazil Holdings, Ltd. Canada L6L 5V6
101 South Hanley Road, Suite 600
St. Louis, MO 63105 Thermadyne Italia SRL
Via Gb Stucchi 66120A
Thermadyne Capital Corp. Monza, Italy 20052
101 South Hanley Road, Suite 600
St. Louis, MO 63105 Thermadyne Hong Kong Limited
3rd Floor Block G Marigold Garden
Thermadyne Chile Holdings, Ltd. 12-14 Marigold Road
101 South Hanley Road, Suite 600 Kowloon
St. Louis, MO 63105 Hong Kong
</Table>
EXHIBIT 21.1
<Table>
Thermadyne Japan Ltd. Thermal Arc Philippines Inc.
4-3-18-201 Zuiko Higashi Ground Floor, PWE Building
Yodogawa-Ka North Road, Jagobiao
Osaka, Japan 533-0005 Mandaue City 6014
Cebu Philippines
Thermadyne Korea, Ltd.
Lot 151, Rawang Integrated Industrial Park Tweco de Mexico SA de C.V.
Jalan Batu Arang Jesus Siqueiros 652
48000 Rawang Col. Alvaro Obregon
Selangor Darul Ehsan Hermosillo Sonora, Mexico 83170
Malaysia
TWECO Products, Inc.
Thermadyne Mfg. LLC 4200 West Harry
101 South Hanley Road, Suite 600 Wichita, KS 67209
St. Louis, MO 63105
Victor Coyne International, Inc.
Thermadyne Receivables, Inc. 2800 Old Airport
101 South Hanley Road, Suite 600 Denton, TX 76202
St. Louis, MO 63105
Victor Equipment Company
Thermadyne South Africa (Pty) Ltd. 2800 Old Airport Road
Dba Unique Welding Alloys Denton, TX 76205
9 First Street
Boksburg North Victor Equipment de Mexico, S.A. de C.V.
Boksburg, South Africa Jesus Siqueiros #652
Stand #471 B14 Colonia Alvaro Obregon
Hermosillo, Sonora, Mexico, 83170
Thermadyne South America Holdings, Ltd.
E&Y Corporate Services Ltd. Victor Gas Systems, Inc.
One Capital Place PO Box 1034 960 Brookroad Suite 1
George Town Grand Cayman Conshohocken, PA 19428-1100
Cayman Island
Wichita Warehouse Corp.
Thermadyne (Thailand) Co. Ltd. 4200 West Harry
Piansri Wattana Bldg. 29/9 Moo 14 Wichita, KS 67209
Banga-Trad Road Rm 6 Bangkaew
Bangplee Samutprakarn Thailand 10540
Thermadyne Victor Ltd.
Avenida Brazil 13629
Rio de Janeiro RJ 21012 - 351
Brazil
Thermadyne Welding Products Canada, Ltd.
2070 Wyecroft Road
Oakville, Ontario
Canada L6L 5V6
Thermal Dynamics Corp.
Industrial Part #2
West Lebanon, NH 03784
Thermal Arc, Inc.
2200 Corporate Drive
Troy, OH 45373
</Table>