Pipeline work
Work for laying PLP,PEM middle?low pressure gas-pipes underground and work for facility of city gas-supply underground pipes

Work for special gas facility
Work for facility of monthly consumption over regulation such as business, industry, apartment, row houses, officetel, hospital, school, church, public bath, restaurant, public office buildings, etc.

Work for general gas facility
Small-scaled facility work, villa, row houses, single-family house work other than work for special gas

Work for LPG-using facility with storage capacity larger than 250 Kg
Facility for storage for collective gas supply and facility for volume storage, etc.

Work for installation of gas-related devices such as gas boiler, etc.
All works for other gas-related facilities, work for changing gas-using facility

Work for converting central heating for apartment to individual heating