In the petrochemical and heat treatment industries, engineers and purchasing personnel face a significant challenge when sourcing superalloy piping: the availability of non-standard specifications.
Standard stainless steel pipe is readily available, but when your project requires heavy-duty GH3030 pipe with thick walls (for high pressure resistance) or large diameters (for exhaust systems), most suppliers will refuse due to high minimum order quantities or lead times of several months. Finding a reliable supplier capable of providing the following is crucial:
Thick-walled pipe (Sch 80, Sch 160, XXS).
Large-diameter welded pipe (500mm and above).
Non-standard or custom-sized seamless steel pipe with zero minimum order quantity.
At Gnee Steel, we bridge this gap. We maintain a large wholesale inventory of GH3030 seamless and welded pipe, ready for rapid delivery to construction sites worldwide.
Check Our GH3030 Pipe Stock List & Sizes Available
GH3030 High Temperature Steel Pipe | Seamless and Welded Steel Pipe Suppliers
GH3030 High Temperature Steel Pipe | Seamless and Welded Steel Pipe Suppliers
GH3030 tubing is a nickel-based high-temperature alloy tubing suitable for corrosion-resistant, high-strength applications, with a maximum operating temperature of 900°C. Major suppliers offer seamless and welded GH3030 tubing and provide custom-sized products specifically for industries such as aerospace, petrochemicals, and furnace components.
What is the Hardness of NIMONIC 75?
Nimonic 75 is a Nickel-based heat resistant superalloy (HRSA) material with a Machinability rating of 17% and Hardness of 90 HRB.
1. GH3030 seamless and welded pipe size range
Whether you need high-pressure seamless tubes for precision instruments or large-diameter welded tubes for furnace exhaust, we have the corresponding production capabilities.
GH3030 Seamless Pipe Dimensional Specifications
| Feature | Range / Specs | Standard / Notes |
| Outer Diameter (OD) | 6mm to 426mm (1/4" to 16") | Precision cold-drawn or hot rolled. |
| Wall Thickness (WT) | 0.5mm to 35mm | Sch 10S, Sch 40S, Sch 80S, Sch 160, XXS. |
| Length | 6000mm Fixed, or Custom Lengths | Cut-to-Length Service available. |
| Surface Finish | Annealed & Pickled, Bright Polished | Ready for precision installation. |
GH3030 Welded Pipe Dimensional Specifications
| Feature | Range / Specs | Standard / Notes |
| Outer Diameter (OD) | 150mm to 1200mm (6" to 48") | Automatic submerged arc or TIG welding. |
| Wall Thickness (WT) | 2mm to 20mm | Perfect for low-pressure exhaust ducting. |
| X-Ray Inspection | 100% RT (Radiographic Testing) | Zero-defect weld seam guaranteed. |
Contact our professionals to recommend alloy pipes suitable for your project
2. Global equivalence of GH3030 alloy
| Standard & Specification | Equivalent Grade | Notes on Quality Control |
| GB/T 15062 / GB/T 14992 | GH3030 | Base standard for Chinese Aerospace/Industrial. |
| ASTM B167 / ASME SB167 | UNS N06075 (Alloy 75) | Global standard for seamless nickel alloy pipe. |
| BS HR5 / W.Nr. 2.4951 | Nimonic 75 / NiCr20Ti | Preferred standard for European turbine builds. |
Click to view our professional certificates for GH3030 alloy
3. GH3030 tubing is primarily used in the following fields
Aerospace: Combustion chambers and afterburners.
Industrial furnaces: Heat treatment equipment components.
Instrumentation: Thermocouple protection tubing.
Chemical industry: Components requiring high corrosion resistance at high temperatures.
Why Source GH3030 High-Temperature Pipes from Us?
✅️Direct Factory Pricing: By cutting out international trading agents, we save you 15-20% on your procurement budget.
✅️Wholesale Inventory: No need to wait 90 days. We stock standard sizes (Sch 10, Sch 40, Sch 80) for immediate dispatch.
✅️MTC 3.1 & 3.2 Traceability: All seamless and welded pipes undergo Hydrostatic testing, Eddy Current testing, and Ultrasonic Testing (UT). Full documentation included.
✅️Custom Fabrication: Need a heavy-wall non-standard size? We can perform custom hot-piercing and cold-drawing to your exact specifications.
Gnee Steel GH3030 Certificate
📦 Packaging and Shipping
All Nickel Based Alloy products are packaged using the following methods:
Wooden pallets or crates
Moisture-proof packaging
Labels with furnace number, standard, and size labels
Shipped worldwide by sea, air, or express
Gnee Steel GH3030 tubing shipping&Packing
Contact us for the latest export price quote for GH3030 Alloy
FAQ
Q1: What is the maximum pressure rating for your heavy-wall GH3030 seamless pipes?
A: The pressure rating depends on the wall thickness and outer diameter ratio. Our Sch 80 and Sch 160 seamless pipes are High-Pressure Rated and can operate safely in petrochemical reactors up to several hundred bars. We provide safe operating pressure calculations per ASME B31.3 upon request.
Q2: Can you manufacture non-standard OD and WT combinations?
A: Yes! This is our core strength. If you need a custom size (e.g., OD 213mm x WT 18mm), we can custom-produce it with a short lead time and flexible MOQ.
Q3: Is 100% X-ray testing available for welded pipes?
A: Absolutely. For large-diameter welded GH3030 pipes (up to 1200mm), we offer 100% Radiographic Testing (RT) of the weld seam to ensure zero porosity and crack-free Structural Integrity.
Q4: Do you offer cut-to-size or precision machining on heavy-wall pipes?
A: Yes, we offer precision beveling, thread cutting, and Cut-to-Size services to ensure the pipes arrive weld-ready at your site.
