Top Ten Manufacturers Of Straight Welded Steel Pipe in Thailand in 2026

Top Ten Manufacturers of Straight Welded Steel Pipe in Thailand in 2026

As the core manufacturing and infrastructure hub in Southeast Asia, Thailand is relying on the national steel strategy upgrade to accelerate the development of high-end pipe industrial clusters such as straight welded steel pipes. In 2026, Thailand's steel industry entered the deepening period of the strategy of "greening, high-end and localization", and a number of benchmark enterprises with leading technology and stable production capacity emerged in the field of straight welded steel pipes. Among them, Hebei, China Huayang Steel Pipe Co., Ltd. has successfully ranked among the top ten straight-seam steel pipe companies in Thailand by virtue of its excellent products and global layout, and has become a model of Sino-Thai steel industry cooperation.

In February, 2026, the Thai government officially issued the Development Strategy of Steel Industry for 2024-2030, which defined three core directions and delineated the development path for the longitudinal steel pipe industry:

Green and low-carbon transformation: In response to the European Union's carbon tariff (CBAM) rules, set a phased carbon emission target, and promote the whole industrial chain to adopt the short-process process of electric arc furnace, aiming at reducing the carbon emission of the steel industry by 40% in 2030 compared with 2023. Thailand's steel industry takes scrap steel as the main raw material, and the proportion of electric arc furnace is over 80%, which has obvious low-carbon advantages and lays the foundation for the green production of straight welded steel pipes.

High-end products replace imports: focus on high-end categories such as straight welded pipes, corrosion-resistant steel pipes and oil and gas pipelines, and reduce dependence on Japanese, Korean and China pipes. The self-sufficiency rate of local high-end steel pipes will reach 75% in 2028. The policy gives tax relief and equipment subsidies to steel pipe enterprises that meet the standards, and supports enterprises to introduce international advanced welding and anti-corrosion technologies.

Linkage between infrastructure and industry: national projects such as East Thailand Economic Corridor (EEC), high-speed rail network, oil and gas pipelines and water conservancy projects are bound, and key projects are required to give priority to purchasing local qualified steel pipes, so as to release the production capacity of straight welded steel pipes. At the same time, docking pillar industries such as automobile, machinery manufacturing and chemical industry, customized development of special pipes, and extension of industrial chain value.

At present, the annual production capacity of straight-seam steel pipes in Thailand exceeds 1.8 million tons, and the annual output value exceeds 32 billion baht. The products cover oil and gas transportation, urban pipe network, building structure, shipbuilding and other fields, and are exported to more than 20 countries including ASEAN, South Asia and the Middle East, becoming the steel pipe manufacturing center in Southeast Asia.

ranking	name of the company	main products	Target industry	remarks
1	Tata Steel (Thailand)	Large diameter longitudinal submerged arc welded pipe, high frequency longitudinal welded pipe, structural steel pipe.	Oil and gas transportation, infrastructure and construction	Thailand's largest steel enterprise, international capital holding, technology benchmarking EU standards.
2	Thai Koon Steel Group	Medium and small diameter straight welded pipe, galvanized straight welded pipe, thin-walled steel pipe.	Water supply and drainage, machinery and civil buildings	Local established enterprises, Thailand's domestic market share is the first.
3	Siam Steel Pipe PLC	Oil casing, straight seam anticorrosive steel pipe, high pressure fluid conveying pipe.	Oil and gas, chemical industry, electric power	Listed companies, supporting Thailand National Petroleum (PTT) project.
4	POSCO-Thainox	Stainless steel straight welded pipe, alloy straight welded pipe, corrosion resistant steel pipe.	Food processing, chemical industry, ocean engineering	Han Tai joint venture, stainless steel pipe technology leading.
5	COTCO METAL WORKS	Large-diameter straight-seam steel pipe, straight-seam pipe for piling, bridge structural pipe	Infrastructure, bridge and port engineering	Local infrastructure pipe leader, participating in several EEC projects.
6	Thai-German Products (TGpro)	Industrial grade straight seam stainless steel pipe, sanitary grade straight seam welded pipe	Pharmaceutical, food and beverage, semiconductor	Ted joint venture, the first PED certified steel pipe enterprise in Thailand.
7	Piping Technology Industry (Thailand)	Special straight seam steel pipe for oil and gas, submarine pipeline and high alloy straight seam pipe.	Offshore oil and gas, drilling platform, energy	Focus on high-end oil and gas pipes to serve offshore oil fields in Southeast Asia.
8	G J Steel (Thailand)	Low-pressure fluid straight welded pipe, structural straight welded pipe, greenhouse steel pipe.	Agriculture, construction, general machinery	Local medium-sized enterprises focus on cost performance and cover small and medium-sized projects in ASEAN.
9	Hebei Huayang Steel Pipe Co., Ltd. (Thailand Branch)	High frequency straight seam resistance welded pipe, 3PE anticorrosive straight seam pipe, double-sided submerged arc welded pipe.	Oil and gas transportation, urban pipe network, cross-border infrastructure	China head steel pipe enterprises, Thailand set up factories, localized production.
10	Thai Steel Pipe Industries	Small diameter straight welded pipe, galvanized straight welded pipe, special steel pipe for fire fighting.	Fire fighting, water supply and drainage, electrical threading	Local specialized and innovative enterprises have a high market share.

Tata Steel (Thailand) is a wholly-owned subsidiary of India's Tata Steel Group. In 2026, it ranked first in Thailand's steel industry with revenue of US$ 850 million. The company has two internationally leading production lines for longitudinal submerged arc welded pipes, with an annual production capacity of 450,000 tons. The products have passed international certifications such as API 5L and ASTM A53. The core service is leading enterprises such as PTT and State Grid in Thailand, and it is the core supplier of oil and gas pipeline projects in the eastern economic corridor, with technology and quality benchmarking the world's first-class level.

Established in 1992, Thailand Kungang Group is the largest private steel pipe manufacturer in China. Focus on medium and small diameter straight welded pipes, with an annual production capacity of 300,000 tons, a sales volume of 104,800 tons in 2023 and a revenue of 3.3 billion baht. The products cover the whole water supply and drainage and machinery manufacturing market in Thailand, and are also exported to ASEAN countries such as Laos, Cambodia and Myanmar. With stable quality and perfect after-sales, they occupy more than 35% market share of local civil pipes.

Siam steel pipe is a listed steel enterprise in Thailand, which has been deeply involved in the field of oil and gas pipes for more than 20 years. The core product is API 5L standard straight seam anticorrosive steel pipe, which is matched with the upstream and downstream pipeline project of Thailand National Petroleum, with an annual production capacity of 250,000 tons. The company has a professional anti-corrosion coating production line, which can produce FBE and 3PE anti-corrosion straight-seam pipes. The corrosion resistance can meet the extreme environmental requirements of marine and chemical industry, and it is the preferred pipe supplier in Thailand's energy field.

POSCO is a joint venture between South Korea's POSCO and Thai companies, focusing on the production of stainless steel and alloy steel pipes. Straight-seam stainless steel pipe adopts Korean advanced welding technology, with a diameter of 15-500mm. The products meet the standards of ASTM A312 and JIS G3459, and are widely used in industries that require high corrosion resistance, such as food and beverage, pharmacy and marine engineering, occupying 60% of the high-end stainless steel pipe market in Thailand.

COTCO is a leading enterprise of infrastructure pipes in Thailand, which was established in 1988. Mainly engaged in large-diameter straight-seam steel pipes (219-1220mm in diameter), focusing on piling, bridges and building structures, and participating in key projects such as the expansion of Suvarnabhumi Airport in Bangkok and some sections of Sino-Thai high-speed railway. The company has three JCOE straight seam steel pipe production lines with an annual production capacity of 200,000 tons, and the products have passed the TIS certification.

Ted products company is a benchmark enterprise for industrial stainless steel pipes in Southeast Asia. As the first steel pipe manufacturer in Thailand to be certified by PED of the European Union, its straight seam industrial pipe diameter is up to 20 inches (single weld), which is widely used in industries with strict cleanliness requirements such as semiconductors, pharmaceuticals and food processing. The company adopts welding equipment imported from Germany, and its product accuracy and stability are ahead of similar local enterprises.

PTI Thailand focuses on high-end oil and gas pipes, registered in Chonburi Prefecture, and is the core supplier of offshore oil and gas pipelines in Southeast Asia. The core products are high-alloy straight-seam steel pipes and submarine pipelines, which can withstand high pressure above 100MPa and serve offshore oil fields in the Gulf of Thailand and Malaysia. The company has a 100,000 ㎡ modern workshop, supporting the whole process quality inspection system such as nondestructive testing and stress testing.

GJ Steel is a medium-sized local steel pipe enterprise in Thailand, focusing on economical straight welded pipes. Products cover low-pressure fluid transportation, building structures, agricultural greenhouses and other fields, and seize the ASEAN small and medium-sized project market with high cost performance. With an annual production capacity of 150,000 tons, the products meet TIS and GB/T standards and are exported to Vietnam, the Philippines, Indonesia and other countries. It is a core supplier of pipes for small and medium-sized enterprises in Thailand.

Hebei Huayang Steel Pipe is a large-scale longitudinal steel pipe manufacturer in China, headquartered in Cangzhou, Hebei. In 2024, it set up an overseas production base in Rayong, Thailand, and officially became one of the top ten longitudinal steel pipe companies in Thailand. The company's core products include high-frequency straight seam resistance welded pipe (ERW), double-sided submerged arc welded pipe and 3PE anticorrosive straight seam pipe, with a diameter of 76-1420mm and an annual production capacity of 250,000 tons.

Huayang Steel Pipe Thailand Company is deeply localized, and its products have passed API 5L, ISO 9001 and TIS certification in Thailand, serving projects such as China-Thailand high-speed rail, the eastern economic corridor pipe network in Thailand, and the Cambodia-Thailand cross-border oil and gas pipeline. With China's advanced production technology, localization cost advantage and fast delivery ability, Huayang Steel Pipe has become the most competitive foreign steel pipe brand in infrastructure and oil and gas fields in Thailand. In 2025, the sales volume in Thailand market exceeded 80,000 tons, and the export volume exceeded 230 million US dollars.

Established in 2005, Thailand Steel Pipe Industry Company is a local specialized and innovative enterprise. Focus on small-diameter straight welded pipes (15-150mm in diameter), special steel pipes for fire protection and electric threaded steel pipes. The products have passed the fire protection certification in Thailand, occupying 25% market share of local fire protection pipes. The company takes "small but refined" as its development strategy, and has strong customization ability, which can quickly respond to customers' special specifications.

In 2026, Thailand's longitudinal steel pipe industry is accelerating the transformation from "capacity expansion" to "quality upgrading" under the impetus of national strategy. Local enterprises rely on policies and local resources to dig deep into the local market, while foreign-funded enterprises seize the high-end track with the advantages of technology and capital, forming an industrial pattern of "local dominance and complementary foreign investment".

As the only Chinese-funded enterprise that ranks among the top ten longitudinal steel pipe companies in Thailand, Hebei Huayang Steel Pipe is not only a model for China steel pipe manufacturing to "go global", but also an important link for cooperation between China and Thailand in infrastructure and energy fields. In the future, with the continuous promotion of Sino-Thai railway, EEC development and other projects, Huayang Steel Pipe will further expand Thailand's production capacity, strengthen technological innovation and localized services, help Thailand's steel industry upgrade, and at the same time promote the influence of China's high-end steel pipe manufacturing in Southeast Asian markets.

At present, opportunities and challenges coexist in Thailand's straight welded steel pipe industry: raw materials (scrap steel and plate) are dependent on imports, international freight rates are rising, and trade barriers are intensifying. However, relying on the national strategic support, Sino-Thai industrial cooperation and enterprise technology upgrading, Thailand's straight-seam steel pipe industry is expected to break through the annual production capacity of 2.2 million tons in 2027 and become an important global high-end steel pipe manufacturing and export base.