Product Brief Introduction
GB 5310 20G high pressure seamless steel tube is a special carbon seamless steel pipe developed specially for industrial boilers. 20G steel grade strictly follows China GB 5310 national standard. This seamless tube features excellent high-temperature strength, good oxidation resistance and stable mechanical performance under high pressure. Widely adopted for high-pressure boiler heating surface tubes, superheater tubes, reheater tubes and steam pipeline in thermal power plants and industrial boiler projects.
Main Technical Parameters
| Item | Specification Details |
| Product Name | GB5310 20G Boiler Seamless Steel Tube |
| Standard | GB 5310 |
| Steel Grade | 20G |
| Product Type | Hot Rolled Seamless Steel Tube / Cold Drawn Seamless Steel Tube |
| Outer Diameter | 16mm – 610mm or customized |
| Wall Thickness | 2.0mm – 80mm or customized |
| Length | Fixed length, random length, customized cut length |
| Surface Condition | Black hot rolled surface / Pickled surface / Polished surface |
| Delivery Condition | Normalizing and Tempering Heat Treatment |
| Testing Items | Hydraulic test, Eddy current test, Ultrasonic testing, Mechanical property test, Chemical composition analysis |
| Certificate | Mill Test Certificate (MTC), ISO Certificate, Third-party inspection support |
Chemical Composition (Mass Fraction, %) GB 5310 Standard
| Element | C | Si | Mn | P | S | Cr | Ni | Cu |
| Standard Requirement | 0.17~0.23 | 0.17~0.37 | 0.35~0.65 | ≤0.025 | ≤0.015 | ≤0.25 | ≤0.25 | ≤0.20 |
Mechanical Properties (Delivery Status: Normalizing + Tempering)
| Performance Item | Index Value | Test Condition |
| Tensile Strength (Rm), MPa | 410 ~ 550 | Room Temperature |
| Yield Strength (Rel), MPa | ≥245 | Room Temperature |
| Elongation (A), % | ≥21 | Room Temperature |
| Hardness (HB) | ≤150 | Room Temperature |
| Impact Energy (Akv), J | ≥35 | 20℃, V-notch |
Working Temperature
| Item | Parameter |
| Max Working Temperature | ≤480℃ |
| Applicable Working Condition | High temperature & high pressure boiler circulation system |
Advantages
| Advantage No. | Advantage Description |
| 1 | Complied fully with GB 5310 standard, 20G material stable chemical composition, reliable quality for high pressure working environment |
| 2 | Outstanding high temperature and high pressure resistance, suitable for long-term operation under boiler high-temperature steam conditions |
| 3 | Compact seamless structure, no welding seam, effectively avoid leakage risk under high pressure medium transportation |
| 4 | Complete size range, support customized outer diameter, wall thickness and cutting length to meet different industrial boiler design requirements |
| 5 | Factory direct supply, stable delivery cycle, flexible MOQ, support third-party inspection before shipment |
| 6 | Good machinability and welding performance, convenient for on-site construction and installation |
Application Scope
| Application Industry | Detailed Usage |
| Thermal Power Plant | Boiler superheater tubes, reheater tubes, water wall tubes |
| Industrial Boiler System | High pressure steam pipeline, boiler heating surface pipeline |
| Petrochemical Industry | High temperature high pressure medium conveying pipeline |
| Energy Engineering | Heat exchange pipeline, high-pressure fluid delivery piping |
| Manufacturing Industry | High-temperature pressure equipment supporting pipes |
Packaging & Delivery
| Item | Content |
| Packaging | Standard seaworthy packaging: bundled with steel strips; waterproof plastic wrapping; end caps to protect pipe inner surface; or as customer requirements |
| Trade Term | FOB, CFR, CIF, EXW, DDP acceptable |
| Port | Tianjin Port, Shanghai Port, Qingdao Port |
| Lead Time | 7 – 25 working days based on order quantity |
FAQ
Q: 1. What is GB 5310 20G seamless steel tube used for?
A: GB 5310 20G seamless tube is mainly used for industrial high pressure boilers, power plant superheater, reheater and steam pipeline under high temperature and high pressure conditions.
Q: 2. What does 20G stand for?
A: 20G is boiler special carbon steel grade in Chinese standard GB 5310, "G" represents boiler steel, designed for high pressure boiler service.
Q: 3. Can you provide customized sizes of 20G GB5310 seamless tube?
A: Yes. We support custom outer diameter, wall thickness and cutting length according to customers' drawings and technical demands.
Q: 4. Can you supply material test certificate (MTC)?
A: Absolutely. Each batch of GB 5310 20G seamless steel tube comes with official factory mill test certificate.
Q: 5. Is third-party inspection acceptable?
A: We support SGS, BV and other third-party inspection before loading.
Product Show
Contact
we are here for you
Tel
Number: +86-22-58162536
Contact directly
Phone/Whatsapp:
+86-15822996332
Hot Tags: gb5310 20g boiler seamless steel tube, China gb5310 20g boiler seamless steel tube manufacturers, suppliers, factory, astm a53 seamless pipe, seamless carbon steel pipe, seamless pipe for column connection, seamless pipe for emergency system connection, seamless pipe for plumbing, seamless pipe for protection system connection
