Company’s Business

Business Overall

IRPC Public Company Limited is Southeast Asia’s integrated petrochemical pioneer. The company operates a refinery and Petrochemical Complex in Rayong. Its main facilities are located within the IRPC Industrial Park, which features the infrastructure needed for its business, including a deep-sea port, an oil depot, and a power plant.

Below is a business description of IRPC: petroleum, petrochemical, and supporting businesses.

Petroleum business

IRPC’s refinery has a total capacity of 215,000 barrels per day (bpd), the 3rd largest refinery in Thailand in terms of production capacity. IRPC manufactures a range of petroleum products, namely liquefied petroleum gas (LPG), naphtha, gasoline, diesel, and fuel oil. Additionally, IRPC’s Lube Base Oil Group I plant has a total capacity of 320 kilotons per annum (KTA), and the associated asphalt plant has a total capacity of 600 KTA, which are the highest domestic capacities. IRPC is also a producer of the Terramaxx branded Rubber Process Oil, whose quality has attained international quality recognition.

Petroleum Extension

The Upstream for Hygiene and Value-Added Products (UHV) project and the Residual Deep Catalytic Cracking Plant (RDCC Plant) have increased the production capacity of IRPC’s refinery to 215,000 bpd. Meanwhile, its production of fuel oil has gone down from 23% to 8% because it has been replaced by higher-value products, mainly Propylene and Naphtha. IRPC’s New Propylene Production capacity is at 320 KTA, adding to the existing capacity of 412 KTA, which results in a total Propylene production capacity of around 732 KTA. (Propylene products will be the feedstock for the project to increase the Propylene production capacity to 160 KTA and the plan to produce 140 KTA of Propylene Compound, which is a High Value-Added product used in the medical and automotive industries.)

The UHV project has a propylene production capacity of 320 KTA. Meanwhile, the Maximum Gasoline project increases IRPC’s Naphtha production capacity from 370 KTA to 462.858 KTA, catering to the domestic market for gasoline.

Responsible for the know-how used in the Maximum Gasoline project is the France-based refining technology provider AXENS, who designed the extension’s production process and updated the refinery towers.

This increase in the gasoline production capacity allowed IRPC to enjoy a larger market share in 2019, adding about 600 million baht a year to its revenue.

Petrochemical business

IRPC is a producer of upstream Petrochemical Products-namely, Olefins and Aromatics. Their production capacities are 1,221 and 367 KTA, respectively. These upstream products are feedstocks for IRPC’s downstream Petrochemical Plants: 915 KTA of polyolefins (HDPE and PP) and 352 KTA of styrenics (ABS, SAN, PS, and EPS). These downstream products are sold to producers of finished plastic products in Thailand and overseas under the brand POLIMAXX.

Focusing on the growth of its Petrochemical Business, IRPC endeavors to stay abreast of global environmental and technological changes through researching and developing new products that will increase its competitiveness. Recent innovations include paralene from natural ingredients, Recycled Compound Resin, and Acetylene Black for Li-on Batteries (Pim-L and Pim-AL). Furthermore, through the Eco Solution project, IRPC has pioneered a closed-loop production for the Plastics Industry in which one plant’s waste is efficiently used as another’s feedstock. The model ensures that no waste would get out of the loop and become a burden to society.

Supporting businesses

Power and public utilities

IRPC provides electricity, steam, and infrastructure, including wastewater treatment and other related services, to industrial clients, supporting their operations. The details of these services are as follows:


IRPC transmits 22 kV and 115 kV of electricity and 25 bars and 45 bars of Steam. Its Combined Heat and Power generation unit uses natural gas as fuel. IRPC also operates a 307 MW coal Power Plant. Its Power Dispatching Center ensures the stability of its electrical current and steam. The Loop Line System allows customers to continue using power despite maintenance.


IRPC provides filtered water, demineralized water, cooling water, raw water, and fire-fighting water from the industrial quota given by the Royal Irrigation Department. The company operates two water filtration plants: one in Ban Khai District and one in the IRPC Industrial Park. IRPC has continued to meet its customers’ water demand, fostering business stability.


IRPC produces and provides nitrogen, instrument air, and plant air for industrial use. The company is also a business partner of pneumatics leaders.

Wastewater Treatment

IRPC uses membrane bioreactor plus activated carbon adsorption (MBR Plus AC) to treat wastewater. This bioprocess is highly efficient and stable. The treated water consistently passes inspection, garnering trust and confidence from the surrounding communities.

Port and tank services

IRPC has a number of domestic and international ports where goods are transported. The following ports are available to outsiders:

IRPC Deep Sea Port, Rayong (Eastern Thailand)

Bulk & container terminal (BCT)

The terminal is 900 meters long and 44 meters wide. It comprises 6 berths. These accommodate vessels of various sizes, ranging from 800 to 150,000 DWT. They handle commodities, such as metal, palm shells, coal, granite, sand, fertilizers, and construction materials. Currently, the terminal handles more than 1 million tons of cargo and accommodates more than 250 vessels per year.

Liquid & chemical terminal (LCT)

This particular terminal is equipped with stateof-the-art equipment to handle liquids and gases efficiently and safely. The terminal is 1,623 meters long. It comprises 6 berths that can accommodate vessels of different sizes, ranging from 1,000 to 250,000 DWT. Currently, the terminal handles more than 15 million tons of liquids and gases and accommodates more than 2,300 vessels per year.

Chao Phraya Port, Phra Pradaeng Oil Depot, Samut Prakan

Wharf No. 13 can accommodate a cargo ship up to 140 meters long with a draft of up to 8.6 meters and a capacity of up to 15,000 DWT.

Pa Sak Port, Ayutthaya Oil Depot, Tha Ruea District, Ayutthaya

Bulk & container terminal (BCT)

This terminal can accommodate a cargo ship up to 140 meters long with a draft of up to 6 meters and a capacity of up to 500 DWT.

Oil-Cargo Terminals 1A and 1B

These terminals can accommodate a cargo ship up to 49 meters long with a draft of up to 6 meters and a capacity of up to 1,000 DWT.

IRPC Deep Sea Port, Sai Ri Beach, Pak Nam Sub-District, Mueang District, Chumphon (Southern Thailand)

This particular port can accommodate a cargo ship up to 85 meters long with a draft of up to 5 meters and a capacity of up to 2,000 DWT.

In addition to ports, IRPC also offers Total Service Solutions. These are a comprehensive range of Logistics Services to facilitate imports and exports, such as Wharf Service, Customs Clearance, Stevedore, and Transportation. Other related services on offer include tugboats, pilots, service boats, mooring, freshwater, bunkers, nautical charts, cranes, hopper cars, weighing, cargo yards, and warehouses.

Tank Service

Additionally, IRPC’s team of experienced specialists operates 299 tanks for liquid petroleum and petrochemical products with a storage capacity of 2.9 million tons, using an efficient management system that meets international safety standards. These tanks accommodate IPRC’s petroleum-based products and those of external organizations. These tanks are located in different oil depots across Thailand—namely Rayong (Eastern Thailand), Phra Padaeng (Bangkok), Phra Nakhon Si Ayutthaya (Central Thailand), and Chumphon (Southern Thailand). Each depot has a port or wharf to accommodate sea freights, which is makes transportation and distribution efficient, lowers costs, and saves time.

Asset management business

IRPC manages some 10,000 rai of high-potential land in Rayong and other provinces, including the WHA Industrial Estate Rayong (WHAIER). The company has developed these plots of land into high-potential industrial estates capable of supporting Thailand’s industrial expansion, especially the development of the Eastern Economic Corridor (EEC) and other governmental policies. IRPC’s asset management business is further divided into three categories:

IRPC Industrial Park, Mueang District, Rayong:

The IRPC Industrial Park features a complete range of infrastructure for industrial development. This industrial hub connects IRPC’s upstream Integrated Refinery and Petrochemical Complex with Direct Downstream Petrochemical Plants, supporting the needs of high technology industries

WHA Industrial Estate Rayong (WHAIER), Ban Khai District, Rayong:

This industrial estate is a joint venture between IRPC and WHA Industrial Development Public Company Limited (WHAID) with a shareholding ratio of 40/60, respectively. It caters primarily to the EEC and the Thailand 4.0 Policy.


IRPC owns a large plot of land of about 2,200 rai in Chana District, Songkhla. The company can develop it into an industrial support base or a commercial base to support a deep water port project and a power plant project of the government. IRPC also owns other smaller plots of land in Rayong, Chiang Mai, and Lamphun.

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