Rongheng supplies Seamless Steel Pipe for pressure, fluid transmission and heavy industrial applications through established domestic production resources. Hot-rolled and cold-drawn options are available, with material, dimensions, testing and processing matched to project requirements and applicable ASTM, EN or GB specifications.
A seamless tube is formed without a longitudinal weld seam, making its structure different from welded pipe. For industrial projects, however, pipe selection is not based on the manufacturing method alone. Material grade, outside diameter, wall thickness, operating pressure, temperature, medium and applicable standard all need to be considered together.
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Manufacturing Hot-rolled or cold-drawn production according to the required section and dimensional accuracy. |
Materials Carbon steel, alloy steel and specified grades such as 20#, 45#, A106 Gr.B, A53, Q345 and 16Mn. |
Testing Hydrostatic testing and applicable non-destructive inspection can be arranged according to requirements. |
Processing Cutting, end preparation, anti-corrosion treatment and project-specific packing are available. |
| Item | Available Options | Project Consideration |
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| Product Type | Hot-rolled Seamless Steel Pipe / Cold-drawn precision seamless tube | Select according to application, dimensional requirements and processing conditions. |
| Material / Grade | 20#, 45#, A106 Gr.B, A53, Q345, 16Mn and alloy grades | The required grade should be confirmed against the project standard and service medium. |
| Dimensions | Outside diameter and wall thickness according to specification | Wall thickness should be selected together with pressure, temperature and design requirements. |
| Length | Standard lengths / Special fixed lengths | Cut-to-length processing is available for project-specific requirements. |
| Applicable Standards | ASTM / EN / GB according to order requirements | Standard, grade and inspection requirements should be confirmed before production. |
Hot-Rolled Seamless Steel PipeSuitable for conventional industrial pipe requirements where standard dimensions, material grade and pressure-service requirements are the main considerations. Common applications include oil and gas transmission, boiler and thermal systems, chemical fluid lines, power facilities and heavy equipment. |
Cold-Drawn Precision TubeUsed where tighter dimensional requirements and more controlled tube geometry are important to the application. It can be considered for hydraulic equipment, mechanical components and other applications requiring precision tube dimensions. |
For industrial orders, inspection requirements can be defined before production. The actual inspection items depend on the applicable standard, material and project specification.
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Dimensional Inspection Outside diameter, wall thickness and length. |
Hydrostatic Test Pressure testing according to the applicable requirement. |
NDT Ultrasonic or eddy-current inspection when specified. |
Documentation Inspection and quality documents according to the order. |
Beyond standard supply, Rongheng can coordinate additional processing according to the drawing or purchase specification. This helps reduce the amount of preparation required after the pipe reaches the project site.
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Fixed-Length Cutting Cut according to specified project lengths. |
End Preparation Pipe-end beveling and related preparation. |
Surface Preparation Anti-rust or corrosion-protection treatment according to requirements. |
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Industrial Packing Packing adapted to ocean transportation and storage conditions. |
Project Identification Classification and marking according to shipment requirements. |
Mixed Supply Different specifications can be coordinated within the project order. |
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Oil & Gas Transmission and process piping where the specified grade and standard are applicable. |
Boiler & Thermal Systems Pipework for thermal and boiler-related equipment. |
Chemical Processing Fluid transportation and industrial process lines. |
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Power Plants Piping and supporting systems for power-generation facilities. |
Hydraulic Equipment Precision tubes and pressure-service components according to application requirements. |
Heavy Machinery Mechanical equipment, mining machinery and industrial structures. |
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Pressure Equipment Used where the selected product meets the equipment specification. |
Low-Temperature Engineering Material and testing requirements can be matched to the specified service condition. |
Industrial Projects Bulk pipe supply for engineering and equipment manufacturing projects. |
For pressure and temperature service, the correct pipe cannot be selected from diameter alone. Send the following information when requesting a quotation:
| Standard | ASTM, EN, GB or project-specific specification |
| Grade | Required steel grade or material specification |
| Dimensions | Outside diameter, wall thickness and length |
| Service | Working pressure, temperature and transported medium when applicable |
| Inspection | Hydrostatic test, NDT and documentation requirements |
Yes. The available production route can be matched to the required dimensions, precision and application.
Wall thickness should be determined together with the design pressure, operating temperature, medium, material grade and applicable engineering standard. Send these parameters for product matching.
Hydrostatic testing and applicable ultrasonic or eddy-current inspection can be arranged according to the order specification. Required inspection items should be confirmed before production.
Yes. Special wall thicknesses, fixed lengths and cold-drawn precision requirements can be evaluated according to the available production route and project specification.
Tell us your required standard, grade, outside diameter, wall thickness, length, quantity and service conditions. For engineering orders, drawings and inspection requirements can also be provided for review.
