| Pipelines and Utility works |
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ITD has laid over 1,500 km of potable water, raw water, waste water, drainage, oil and gas pipelines of all diameters through urban and rural environments. ITD's construction teams are familiar with crossing all types of terrain, be it mud, sand, rock, swamp, shore crossings, river crossings or undersea. Construction techniques such as open trenching, directional drilling, tunnelling, pipe jacking, "float and sink" and "bottom pull" are used to meet the terrain challenges. The construction of the high pressure multi-product petroleum pipeline for Fuel Pipeline Transportation Co., Ltd. across Bangkok presented ITD with unique challenges for resolving an alignment and the construction of this vital fuel supply pipeline in very congested conditions. ITD has also constructed multi-product pipelines and the Lumlukka Tank Terminal for Thai Petroleum Pipeline Company Limited. ITD has constructed 100 km of cross country gas pipelines up to 600 mm diameter to supply high pressure natural gas to power stations operated by the Electricity Generating Authority of Thailand (EGAT) and to Independent and Small Power Producers supplying the Thai electricity grid. ITD has also constructed 74 km of 450 mm diameter high pressure petroleum products pipelines. Large underground duct banks and manholes, for telephone and electricity cables, and major trunk pipelines, for drainage and waste water management, constructed under some of Bangkok's busiest and most congested roads, required innovative pipe jacking construction methods. As part of the Samut Prakarn Wastewater Treatment Project collection and disposal system, ITD constructed two 900 mm diameter HDPE waste water pipelines under the Chao Praya River, using directionally drilled bore holes over 1,200 m long, and an outfall tunnel and diffuser system 3,240 m long and 2,600 mm diameter. In Bangkok, ITD has constructed three major water treatment plants: the Bangkhen Water Treatment Plant having a capacity of 800,000 m3/day, the Mahasawat Water Treatment Plant Phase 1 with a capacity of 1.2 million m3/day and the Mahasawat Water Treatment Plant Phase 2 with a capacity of 400,000 m3/day. To meet the special challenges of these complex projects, ITD draws on foreign expertise, through consultants and joint venture partners, to make the best use of local skills and the latest technologies available worldwide.
COCO Coal Handling System (April 1999 - May 2002) Construction the coal handling system at the COCO Power Plant, including a 1.143 m long conveyor belt and a coal handling jetty requiring 534,035 m3 of dredging.
230 KV Underground Power Lines (Lad Phrao Rd. - Vibhavadee Rd.) (March 1999 - October 2002) 8 km of pipejacking of a 2,600 mm dia. pipe for an underground power cable ductbank of 21 ducts. 
Experience
• Rojana Natural Gas Transmission Pipeline (December 1997 - October 1998) Design and construction of a natural gas pipeline, 16 inch diameter, 21.4 km including 2 metering stations and control system. • Map Ta Phut Feederline (August 1997 - August 1998) Installation of a 14 inch diameter, 61 km multi-product pipeline from Map Ta Phut to Sriracha tank terminal including installation of fibre optic cables. • Submarine Pipelines for Thai Oil HDS Project (January 1997 - July 1998) Design and construction of 3 submarine petroleum pipelines, 24 inch diameter, 2.4 km each. Works include installation of electro-hydraulic subsea umbilicals, hydraulic operated subsea ball valves and controlsystem. • Underground Duct Bank and Manhole Jitlada Project (October 1996 - November 1998) Design and construction for 8.6 km of 1,500 mm diameter pipeline at 4 m depth using pipe jacking methods. • MEA Twin Duct Bank (April 1995 - October 1997) Construction of 71 km duct bank of 127 mm FRE conduits, 16 km of 125 mm HDPE conduits, plus 40 m of 1,800 mm diameter pipe jacking. • Star Petroleum Refinery (Pipelines and Piperacks) (March 1994 - May 1996) Construction of steel piperacks and installation of 48 inch diameter 2.0 km long pipeline and 36 inch diameter 5.0 km long pipeline. • Supply and Installation of MWA Trunk Mains and Related Works,Contract No. PIT-403 (February 1994 - October 1996) Installation of water trunk mains of 600 mm and 1,500 mm diameter with a total length of 24.75 km. • Thappline Lamlukka - Saraburi Multi-Product Pipeline (September 1992 - September 1993) Construction of a pipeline comprising 74 km of 18 inch diameter and 12 km of 10 inch diameter pipes and associated tank farm. • Fuel Pipeline Transportation Project (June 1992 - September 1993) Design and construction of a 14 inch diameter, 69 km multi - product pipeline system from Bangkok to Bang Pa - In, including 3 pumping stations and tank farm. • Supply and Installation of MWA Trunk Mains and Related Work,Contract No. PIAT-206 (November 1987 - September 1988) Installation of a water pipeline 600-700 mm in a total length of 8.6 km. • Dok Krai - Map Ta Phut Water Pipeline (April 1983 - October 1984) Fabrication, transportation and installation of 1350 mm diameter steel pipeline, 26.5 km long. Construction of a reinforced concrete intake tower of 20 m height, a head tank of 25 m height and capacity 4,900 m 3 , a receiving well and the installation of main pumps. • L.P.G. Transfer Pipeline (1983 - 1984) Installation of 3 pipelines from Map Ta Phut to Sriracha. 65 km of 4 inch, 8 inch and 10 inch diameter pipes. • MWA Water Transmission Tunnel (1981 - 1983) Construction of a 2.2 km pipe tunnel of 2,000 mm nominal diameter and 7.5 km of 2,800 mm diameter water transmission tunnel.
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