Structure Pipe
Structure Pipe - industrial steel pipe
Infrastructure demands materials with superior strength, stability, and durability.
They are ideal for water and sewage systems, gas and district heating networks, industrial media pipelines, and bridge construction.
In plant engineering, our tube products are used across a wide range of technical systems — from energy supply facilities and industrial process plants to complex production facilities. Special focus lies in energy and boiler construction, where materials must withstand extreme pressure and temperature conditions.
Plant engineering operates under demanding operating conditions including extreme high/low temperatures, sustained high pressure and corrosive chemical media, requiring the most stringent material quality standards. Our comprehensive portfolio of seamless carbon, alloy and stainless steel tubes together with matching seamless pipe fittings are widely deployed across thermal power stations, refineries, chemical factories, fertilizer plants, pharmaceutical facilities and general manufacturing process lines. Our extensive lineup of premium piping products covers all your process plant application requirements. Locate the ideal material grade and specification matching your plant design parameters within our complete product groups.
Process plant piping runs continuously year-round under cyclic temperature and pressure fluctuations, exposed to steam, acid, alkaline, sulfur and flue gas media. Material creep resistance, corrosion resistance and long-term structural stability are critical to avoid leakage, rupture and unplanned plant shutdowns. We provide two core piping categories: high-temperature high-pressure alloy tubes for power boiler & steam systems, and corrosion-resistant carbon/stainless tubes for chemical process pipelines, fully compliant with international ASME, ASTM, EN and Chinese GB industrial standards.
| Standard System | Standard Code | Plant Application Scope |
|---|---|---|
| US ASME / ASTM Standard | ASTM A335 P11/P22/T91, ASTM A106 Gr.B, ASME B16.9 | Power station high temp alloy pipe & seamless butt weld fittings |
| European EN Standard | EN 10216, EN 10253 | EU chemical plant & general industrial process piping |
| Chinese GB National Standard | GB 5310, GB/T 6479, GB/T 12459 | Domestic power boiler, high-pressure fertilizer plant pipeline |
| Stainless Corrosion Resistant | ASTM A312, GB/T 14976 | Pharmaceutical, acid & corrosive medium process lines |
| Steel Grade | Core Performance Feature | Typical Plant Application |
|---|---|---|
| A106 Gr.B / 20# | Mild carbon steel, general medium pressure steam & water | General auxiliary process pipelines, low pressure heating lines |
| P11 / WP11 / 15CrMo | Cr-Mo alloy, creep resistant up to 580℃ | Medium temperature boiler header, refinery heating pipelines |
| P22 / WP22 / 12Cr2Mo1 | High creep strength, long-term high pressure resistance | Power plant superheater, high-temperature reaction furnace piping |
| T91 / GB5310 | Ultra high temperature alloy for supercritical units | Ultra-supercritical thermal power boiler main steam pipeline |
| 304 / 316 Stainless | Acid & alkali corrosion resistance | Chemical, pharmaceutical, food processing process piping |
Cr-Mo alloy grades P11/P22 are the primary selection for high-temperature power and refinery plant main process piping due to outstanding anti-creep performance under long-term heat & pressure loads.
| Material Type | Mandatory Heat Treatment | Plant Working Condition |
|---|---|---|
| Carbon Steel 20# / A106 Gr.B | Normalizing | Medium temperature general process pipelines |
| Cr-Mo Alloy P11 / P22 | Full Annealing + Tempering | High temp power & refinery main steam lines |
| Stainless Steel 304/316 | Solution Annealing | Corrosive chemical medium pipelines |
EN 10204 3.1 / 3.2 official MTC material test certificates are issued per batch, fully compliant with international plant EPC tender and third-party supervision audit standards.
Ceramic lined pipe is made through self-propagating high-temperature synthesis (SHS) technique.
Cast basalt lined steel pipe is composed by lined with cast basalt pipe, outside steel pipe and cement mortar filling between the two layers.
Ceramic tile lined pipes have very uniform coating of specially formulated ceramic material that is affixed to the inner of the pipe.
The material of the rare earth alloy wear-resistant pipe is ZG40CrMnMoNiSiRe, which is also the grade of rare earth alloy steel.
Tubes Erosion Shields are used to protect boiler tubing from the highly erosive effects of high temperatures and pressures thereby greatly extending tube life.
The ASTM A213 T91 seamless tubes are primarily used for boiler, superheater, and heat-exchanger.
When you partner with Sunny Steel, you can stop worrying about meeting deadlines thanks to our responsive and timely service. You'll also say goodbye to unnecessary shopping around. Instead, you'll get white glove service from an expert who understands your needs and can get you the materials you need quickly.
