Jiangsu Changbao Steeltube

What Jiangsu Changbao Steeltube does

Jiangsu Changbao Steeltube Co., Ltd. (常宝股份) is a Jiangsu Province-based specialty seamless steel tube manufacturer founded in 1958 and listed on the Shenzhen Stock Exchange (stock code: 002478) since September 21, 2010. The company operates three manufacturing bases — Changzhou, Jintan, and Sohar (Oman) — with an aggregate annual production capacity of 1 million tons. Its core competency is high-precision, high-strength seamless tubes built on proprietary processes including CPE rolling (for which it is the only research institution in China), ASSEL rolling, and proprietary heat-treatment capabilities, combined with a CBS series of premium thread connections for OCTG and extended-length boiler tubes for ultra-supercritical power generation.

The product portfolio spans six verticals: (1) oil industry tubes, including full-range API 5CT casing and tubing, proprietary CBS1–CBS3 special thread connections certified to ISO 13679-CAL IV, anti-H2S/CO2 corrosion grades (3Cr–15Cr variants), high collapse-resistance casing (115–180% of API values), drill pipe blanks, coupling blanks, perforating gun tubes, and screen pipes; (2) boiler industry tubes covering GB5310, ASTM/ASME, EN, and JIS standards, including HRSG ultra-long tubes (up to 28m), U-type and Π-type feedwater heater tubes, and optimized internal-thread boiler tubes delivering 20% higher heat-transfer efficiency than standard rifled tubes; (3) automotive precision and hydraulic tubes; (4) petrochemical and high-pressure fertilizer tubes rated −40°C to 400°C at 10–32 MPa; (5) construction machinery hydraulic cylinder tubes and high-strength boom tubes up to 1100 MPa tensile strength; (6) specialty products including offshore/marine tubes, low-temperature tubes (−100°C), high-pressure gas cylinder tubes, and geological/trenchless drilling tubes. In addition to its proprietary CBS and INTEG-MAX (co-developed with Japan's Metalone) thread systems, Changbao offers integrated Flush-Max, Super-Max, and GEOCONN connections.

Changbao's business model is one-time sale of custom-manufactured steel tubes, with quote-based B2B pricing negotiated on grade, dimensional tolerance, volume, and certification requirements rather than on listed unit pricing, and with multi-year contracts common among major OEM and IOC customers. Distribution is enterprise-direct, complemented by Alibaba 1688 and Ouyicloud marketplace storefronts and dedicated QQ customer-service channels per product category. Reported named customers include CNPC, Sinopec, and major Chinese oilfields (Daqing, Jilin, Dagang, Changqing, Southwest, Shengli, Jidong) on the OCTG side, and Harbin Boiler, Shanghai Electric, Dongfang Electric, IHI (Japan), and Alstom on the power-equipment side, plus international O&G customers PDO, Rosneft, Lukoil, TNK-BP, and the national oil companies of Colombia, Venezuela, and Ecuador. The R&D center is staffed by 90+ researchers including 2 academicians and 28 Master's+ degree holders and holds multiple Jiangsu Province certifications; the company was re-certified as a National High-Tech Enterprise through 2014, received AAA ESG status in July 2025, and earned MIIT 9th-batch Manufacturing Single Champion recognition in November 2025. Revenue is not disclosed in the available data; the Omani base (inaugurated 2016-10-10 as the first Chinese industrial project in the Sohar Free Zone) supports the Middle East/Africa export channel.

Name

Jiangsu Changbao Steeltube

Legal name

Jiangsu Changbao Steeltube Co., Ltd.

Website

https://cbsteeltube.com

Company type

Public

Founded year

1958

Operating status

Operating

Headcount range

501–1,000 employees

Short description

Jiangsu Changbao Steeltube manufactures specialty seamless steel tubes — premium-connection OCTG, ultra-supercritical boiler tubes, and corrosion/collapse-resistant grades — serving Chinese NOCs (CNPC, Sinopec), major Chinese and international oilfields, and power-equipment OEMs (Harbin Boiler, Shanghai/Dongfang Electric, IHI, Alstom) from three plants with 1M-ton annual capacity.

Ownership category

akta.pro rank

Product category

Specialty Seamless Steel Tubes

NAICS

Iron and Steel Pipe and Tube Manufacturing from Purchased Steel (331210)

SIC

Steel Pipe & Tubes (3317)

akta.pro primary industry

Pipe & Tube Manufacturing (Seamless & Welded OCTG/Line Pipe/Structural Tube) (IMAKABAI)

akta.pro secondary industries

Hoses, Tubing & Fittings (Hydraulic/Pneumatic Lines & Connectors) (IMAHAGAH), Pipes & Tubing (Metal, Plastic & Composite) (IMADALAC)

Keywords

• Seamless steel tubes
• Oil country tubular goods
• High-pressure boiler tubes
• Premium connection casing
• Specialty alloy tubes

Headquarters

HQ city

Liyang

HQ country

China

HQ region

Asia

Offices3 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Operations, Infrastructure, Personnel, Technology or R&D, Marketing or Sales

Revenue model

1. Specialty Seamless Steel Tube Sales: Changbao generates revenue through the manufacture and sale of specialty seamless steel tubes. The company operates on a one-time product sales model with annual production capacity of 1 million tons across three manufacturing bases (Changzhou, Jintun, and Oman). Product categories include OCTG (oil country tubular goods), boiler tubes, automotive tubes, petrochemical tubes, construction machinery tubes, and other specialty tubes.

Pricing tiers

Go-to-market motion2 records

Distribution channels4 records

Marketing channels7 records

Core offering

Jiangsu Changbao Steeltube manufactures specialty seamless steel tubes serving oil and gas, power generation, automotive, petrochemical, and construction machinery industries. The company's portfolio includes oil country tubular goods (OCTG) with proprietary premium thread connections, corrosion-resistant and high-collapse casing, high-pressure boiler tubes for supercritical/ultra-supercritical power plants, automotive precision and hydraulic tubes, and petroleum cracking tubes. Products are produced at three manufacturing bases (Changzhou, Jintan, Oman) with combined annual capacity of 1 million tons.

Product overview

Jiangsu Changbao Steeltube (常宝股份) is a specialized steel tube manufacturer serving the oil and gas, power/boiler, automotive, petrochemical, and construction machinery industries. The company's portfolio spans six product categories: (1) Oil Industry Steel Pipe (石油行业专用钢管), including API and premium-connection oil casing and tubing, corrosion-resistant products (H2S and CO2), high collapse-resistance casing, perforating gun tubulars, screen pipes, drill pipe blanks, and coupling blanks; (2) Boiler Industry Steel Pipe (锅炉行业专用钢管), covering GB5310, ASTM, EN/JIS standard high-pressure boiler tubes, HRSG ultra-long tubes, feedwater heater U-tubes and Π-tubes, and internal-thread boiler tubes (standard and optimized); (3) Automotive Industry Steel Pipe (汽车行业专用钢管), including precision automotive tubes, half-axle tubes, and hydraulic cylinder tubes; (4) Petrochemical Industry Steel Pipe (石化行业专用钢管), including petroleum cracking tubes and high-pressure fertilizer tubes; (5) Construction Machinery Steel Pipe (工程机械专用钢管), including hydraulic cylinder tubes and high-strength boom tubes; and (6) Other Specialty Steel Pipe (其他特种专用钢管), including structural tubes, fluid conveyance tubes, offshore/marine tubes, low-temperature tubes, high-pressure gas cylinder tubes, geological and trenchless drilling tubes. The company operates常州, 金坛, and 阿曼 (Oman) manufacturing bases with annual capacity of 1 million tons of specialty steel tubes.

Differentiator

Problem solved

Functional benefit

Products and services

• Acid Service Line Pipe (酸性服役管线管) Line pipe for transporting oil and gas, including acid service line pipe for sour gas environments containing H2S and CO2, covering all API 5L steel grades. Used by oil and gas pipeline operators and EPC contractors in corrosive service applications.
• H2S Corrosion-Resistant Oil Casing and Tubing (抗硫化氢腐蚀油套管) Corrosion-resistant oil casing and tubing with proprietary CBS series premium connections for H2S sour gas environments, using chromium-molybdenum steel alloys. Sold to oil and gas companies (CNPC, Sinopec, Daqing, Changqing, etc.) and international oil majors.
• CO2 Corrosion-Resistant Oil Casing and Tubing (抗二氧化碳腐蚀油套管) CO2 corrosion-resistant oil casing and tubing using chromium-nickel-molybdenum alloy steels (3Cr, 5Cr, 9Cr, 13Cr, 15Cr) with CBS series gas-seal premium connections for CO2 and CO2+Cl environments. For upstream oil and gas operators in CO2-rich fields.
• Premium Connection Oil Casing and Tubing (特殊扣油套管) Proprietary CBS series premium connection oil casing and tubing (CBS1, CBS2, CBS3, CBX, CBIJ, CB-EU-HT, CB-SF, CBTS) and cooperatively developed connections (INTEG-MAX, Flush-Max, Super-Max, MO-EU-PA, GEOCONN) for deep wells, horizontal wells, and high-pressure gas wells. Sold to oil and gas companies requiring gas-tight sealing in demanding well geometries.
• High Collapse-Resistance Casing (高抗挤套管) High collapse-resistance casing with optimized material composition and manufacturing processes achieving 115%–180% of API collapse strength, for shale gas, deep wells, and casing staged fracturing applications. Sourced by oilfield operators and drilling contractors.
• Full-Range API Oil Casing and Tubing (全系列API油套管) Full-range API SPEC 5CT oil casing and tubing covering all API steel grades (H40, J55, K55, N80, M65, L80, C90, T95, P110, C110, Q125), with outer diameter 26.67–508 mm and wall thickness 3.18–22.2 mm. For oil and gas field operators and procurement organizations.
• Perforating Gun Tubulars (射孔枪用管) Full-size series high-strength perforating gun tubulars (CB-Q110 through CB-Q155) for manufacturing oil and gas well perforating guns, suitable for conventional, horizontal, through-passage, and enhanced perforating guns at conditions up to 220°C and 220 MPa. Sold to oilfield service companies.
• Oil and Gas Well Screen Pipe (油气井用筛管) Slotted, perforated, wire-wrapped, bridge-type, and composite screen pipes for sand control in oil, gas, and water wells, with OD 114.3–219.08 mm. For sand-control completion applications in upstream oil and gas operations.
• Drill Pipe Blanks (钻杆管料) Full-range API and non-API grade drill pipe blanks (E75, X95, G105, S135, S155) with end-upsets for oil and gas drilling, with OD 60.32–168.28 mm and wall thickness 7.11–12.7 mm. Sold to drill pipe manufacturers and oilfield operators.
• Coupling Blank Pipe (接箍管料) Seamless steel pipe blanks for manufacturing oil casing and tubing couplings, produced by ASSEL rolling mill, covering API SPEC 5CT grades (J55 through C110) and corrosion-resistant grades. For coupling manufacturers serving the OCTG supply chain.
• GB5310 High-Pressure Boiler Tube (GB5310高压锅炉管) High-pressure boiler tubes for supercritical and ultra-supercritical boilers (superheaters, reheaters, water wall, economizers), producing steel grades 20G, SA210A1, SA210C, 15CrMoG, 12Cr1MoVG, R102, with OD 16–219 mm and WT 2.0–40.0 mm per Chinese GB standard. Sold to boiler manufacturers and power generation equipment OEMs.
• ASTM High-Pressure Boiler Tube (ASTM高压锅炉管) ASTM/ASME standard high-pressure boiler tubes (SA-179M through SA-213M T91) for supercritical boilers with OD 15.88–89 mm and WT 2.6–12.5 mm. Sold to international boiler manufacturers and power plant operators in markets requiring ASTM/ASME compliance.
• EN/JIS Standard Boiler Tubes (欧标及日标锅炉管) European (EN 10216-2) and Japanese (JIS G3454, G3461, G3462) standard boiler tubes covering multiple grades including P195GH through X20CrNiV11-1 and STPG/STB/STBA series, with OD 15.88–89 mm and WT 2.6–12.5 mm. Sold to European and Japanese boiler manufacturers.
• HRSG Ultra-Long Boiler Tubes (HRSG超长锅炉管) Heat recovery steam generator (HRSG) ultra-long tubes with length 16–26 m (max 28 m) for waste heat recovery in combined-cycle power generation, certified by Harbin Boiler, Shanghai Boiler, Dongfang Boiler, IHI, and ALSTON, with OD 26–65 mm and WT 2.4–7 mm. Sold to HRSG manufacturers globally.
• High-Pressure Feedwater Heater U-Tube (高压给水加热器用U型锅炉管) U-shaped boiler tubes for high-pressure feedwater heaters with length up to 35 m (L/D ratio >1000), operating at 350°C+ and 30+ MPa, with OD 12–25 mm and WT 1.0–4.0 mm. Sold to power plant operators and heat exchanger manufacturers for high-pressure feedwater heating applications.
• Optimized Internal Thread Boiler Tube (优化内螺纹锅炉管) Optimized internal-thread (rifled) boiler tubes for water-wall membranes in power station boilers, with 40°+ helix angle providing 20% higher heat transfer efficiency than standard internal-thread tubes, with OD 22–82.6 mm and WT 4.0–16.0 mm. Sourced by power station boiler manufacturers.
• High-Pressure Feedwater Heater Π-Type Tube (高压给水加热器用Π型管) Π-shaped (flat-bottom) boiler tubes for high-pressure feedwater heaters used in small-capacity units at 350°C+ and 30+ MPa for heat recovery applications. Sold to power plant equipment manufacturers and operators.
• Petroleum Cracking Tube (石油裂化管) Petroleum cracking tubes for petrochemical industry operation, maintenance, equipment manufacturing, and plant construction, meeting high-pressure, high-temperature, and corrosion-resistance requirements. Sold to petrochemical and refining operators and EPC contractors.
• High-Pressure Fertilizer Tube (高压化肥管) High-pressure fertilizer tubes in carbon and alloy steel for chemical equipment operating at -40–400°C and 10–32 MPa, suitable for ammonia, urea, and methanol transport. Sold to chemical and fertilizer plant operators and equipment manufacturers.
• Automotive Precision Tube (汽车精密管) Precision automotive tubes for steering, shock absorbers, drive shafts, steering gears, axles, mufflers, and over 10 automotive part series, with OD 16–114 mm and WT 1.0–10.0 mm. Sold to automotive OEMs and Tier 1 component suppliers.
• High-Strength Boom Tube for Construction Machinery (高强度臂架用管) High-strength boom tubes for crawler cranes in proprietary grades CB590QL, CB770QL, CB890QL with tensile strength up to 1100 MPa and good low-temperature impact toughness. Sold to construction machinery OEMs, particularly crawler crane manufacturers.
• Low-Temperature Tube (耐低温管) Low-temperature seamless tubes rated to -100°C for cryogenic pressure vessels, heat exchangers, and fluid conveyance, in ASTM A333/A334 grades (Grade 1 through 10) and API 5CT N80, L80-1, L80-3Cr, P110. Sold to cryogenic equipment manufacturers and LNG/industrial gas operators.
• High-Pressure Gas Cylinder Tube (高压气瓶管) High-pressure gas cylinder tubes for manufacturing high-pressure vessels in mining, industrial, firefighting, and medical applications, in GB 18248 and JIS G3429 grades, with OD 16–219.1 mm and WT 2.0–40.0 mm. Sold to gas cylinder manufacturers.
• Offshore and Marine Engineering Tube (海工用管) Offshore engineering tubes including subsea OCTG, subsea long-distance transport pipe, and subsea gathering lines and risers, with high strength, toughness, and seawater corrosion resistance, in grades L245 through L555. Sold to offshore oil and gas and marine construction operators.
• Structural Tube (结构用管) Carbon structural and low-alloy high-strength structural tubes for mechanical structures and general engineering, with OD 16–219 mm and WT 2.0–40.0 mm, in grades 20 through E470. Sold to general engineering, construction, and machinery manufacturers.
• Fluid Conveyance Tube (流体输送管) Fluid conveyance tubes for transporting water, oil, and gas in engineering and large equipment, in grades 10, 20, Q295 through Q460, meeting GB/T 8163 and EN 10216-1 standards. Sold to engineering contractors and industrial equipment manufacturers.
• Hydraulic Cylinder Tube for Automotive (汽车用油缸用管) Hydraulic cylinder tubes for automotive applications in steel grades 20# through E470, for normal/low-pressure and high-pressure hydraulic cylinders. Sold to automotive system integrators and Tier 1 hydraulic component manufacturers.
• Hydraulic Cylinder Tube for Construction Machinery (工程机械用油缸用管) Precision hydraulic cylinder tubes for construction machinery and hydraulic equipment with high dimensional accuracy and surface finish, in steel grades 20–E470, with OD 63.5–219.1 mm and WT 7.1–20.0 mm. Sold to construction machinery OEMs and hydraulic system manufacturers.
• Medium-to-Heavy Wall Mechanical Tube (中厚壁机械管) Medium-to-heavy wall mechanical tubes for turning, cold-drawing, and construction machinery structural parts, with OD 16–219.1 mm and WT 4.0–40.0 mm, in steel grades 20# through ANSI 4340. Sold to machinery part fabricators and component manufacturers.
• Automotive Half-Axle Tube (汽车半轴管) Axle tubes for semi-trailer axles, agricultural vehicle axles, and crane vehicle axles in steel grades 20Mn2, 20Mn2V, SAE1527, with dimensions Ø127×10 to Ø194×30 mm. Sold to commercial vehicle and special vehicle manufacturers.
• Trenchless Drilling Pipe (非开挖钻杆) Trenchless drilling pipes for horizontal directional drilling (HDD) pipeline installation in grades G105, S135, V150, with OD 50–168.28 mm and WT 6.00–12.7 mm. Sold to pipeline construction contractors and HDD service providers.
• Changbao Small-Diameter Tubing (常宝小油管) Small-diameter tubing with OD 26.67–48.26 mm for water injection, oil extraction, and gas recovery, available in API types (NU, EU, IJ) and non-API types (CB-IJ, CB-FJ) with J55, N80, L80, P110 steel grades. Sold to oilfield operators for slim-hole and workover applications.
• Extra-Long Heavy-End Tubing and Plain-End Tubing (加长加厚油管及光管) Extra-length heavy-end tubing and plain-end tubing for premium connection machining and repeated re-threading in oil field tubing reuse applications in carbon steel (N80-Q, L80-1, T95, P110) and 13Cr grades, with OD 60.3–114.3 mm. Sold to oilfield service companies and tubing manufacturers.

Quantifiable outcome

• Annual production capacity of 1 million tons of specialty seamless steel tubes
• +5 more outcomes

Named customers21 records

Segments5 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature7 records

Partnerships

Four partnerships are on record, tiered core.

• Metalone Co. Ltd. (Japan)coreTechnology or IntegrationJoint development partner for INTEG-MAX special thread connection technology. Metalone is a Japanese technology company specializing in OCTG connection solutions. The INTEG-MAX product is designed for abandoned well recovery, deviated wells, and large-inclination well operations, particularly for small casing and tubing connections in Russian oilfields (e.g., TNK-BP). The partnership combines Metalone's connection technology expertise with Changbao's manufacturing capabilities.
• Hohai University (河海大学) - College of Mechanical and Electrical EngineeringcoreStrategic or Co-development PartnerEstablished a joint 'Jiangsu Province Enterprise Graduate Workstation' in 2012 for collaborative talent development and research. Hohai University is a well-known engineering university in Jiangsu Province. The partnership supports Changbao's R&D in mechanical and materials engineering for specialty steel tube applications.
• PDO (Petroleum Development Oman)coreChannel Partner/ Reseller/ DistributorKey customer and partner for the Oman Oil Country Tubular Goods project. PDO representatives attended the project inauguration ceremony in October 2016. The Oman project enables Changbao to serve the Middle East market directly, with PDO being one of the largest oil producers in Oman.
• Sohar Free Zone Authority (Oman)coreStrategic or Co-development PartnerHost authority for Changbao's Oman manufacturing project in the Sohar Free Zone. Sohar Free Zone is a major industrial development zone in Oman. Changbao's project is the first Chinese industrial project in the Sohar Free Zone, aligned with China's Belt and Road initiative. The partnership provides preferential industrial zone conditions for manufacturing and market access to the Middle East and Africa.

Scale indicators10 records

Recent moves8 records

Expansion highlights5 records

Direct peers

• Vallourec: French-headquartered seamless tube leader with strong OCTG presence and VAM premium connection portfolio. Comparable to Changbao in deepwell/sour-service OCTG, boiler tubes, and downstream oil & gas end-markets.
• Tenaris: Global leader in seamless OCTG and line pipe, with proprietary premium connections (TenarisBlue) and major service centers worldwide. Directly comparable to Changbao in OCTG, boiler, and line pipe end-markets and in pursuit of non-API premium thread differentiation.
• Tianjin Pipe Corporation (TPCO): China's largest seamless steel pipe producer serving OCTG, boiler, and line pipe markets. Closest domestic competitor to Changbao across product grades and end-customers (CNPC, Sinopec).
• Hengyang Valin Steel Tube: Chinese seamless steel tube manufacturer serving OCTG, boiler, and mechanical tube segments. Domestic competitor with overlapping customer base in Chinese oilfields and power equipment OEMs.
• TMK (Pipe Metallurgical Company): Russia's largest seamless pipe producer with strong OCTG/corrosion-resistant grades and proprietary premium connections. Directly comparable to Changbao in Russian oilfield OCTG and H2S/CO2 corrosion-resistant product portfolio.
• Sumitomo Corporation: Japanese trading/integrated group with major seamless tube and OCTG exposure, including proprietary premium connections. Comparable to Changbao in boiler tubes for IHI and other Japanese power OEMs and in corrosion-resistant OCTG.

Broad incumbents

• Nippon Steel Corporation: Japan's largest integrated steelmaker with broad seamless and welded tube capabilities including OCTG, boiler, and line pipe. Operates broadly in the same steel tube space but as part of a wider portfolio versus Changbao's specialty focus.
• JFE Steel: Major Japanese integrated steelmaker producing seamless OCTG and line pipe for global upstream and pipeline markets. Overlaps with Changbao in corrosion-resistant OCTG and high-grade boiler tubes as part of a much broader product portfolio.
• China Baowu Steel Group: China's largest state-owned steelmaker with broad seamless tube exposure serving domestic oil, power, and construction markets. Indirect competitor with overlapping Chinese customers but broader commodity focus than Changbao's specialty tube positioning.
• ArcelorMittal: World's largest steelmaker with global seamless tube and OCTG production capability via its tubular products division. Competes with Changbao in line pipe, OCTG, and boiler tube exports but operates across a far broader steel portfolio.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat6 records

Key risks6 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/jiangsu-changbao-steeltube-co-ltd-

Compliance9 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles5 records

Subsidiaries1 record

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Jiangsu Changbao Steeltube