At our facility in Canberra, Australia, we take pride in being a leading manufacturer and supplier of top-notch carbon steel RTJ (Ring-Type Joint) flanges. These flanges are specifically crafted for high-pressure industrial piping systems that demand dependable, metal-to-metal sealing. Our selection features both forged and machined RTJ flanges made from high-quality carbon steel grades, including ASTM A105/A105N and A350 LF2, all while adhering to key international standards like ASME B16.5, ASME B16.47, DIN, and EN. We focus on precision machining of the ring-groove face, ensuring strict material traceability and full certification, which guarantees leak-tight performance even in the toughest service conditions.
Carbon Steel A350 LF2 Flanges are composed primarily of iron with a carbon content of up to 0.30%, along with alloying elements like manganese, phosphorus, and sulfur. They are designed for low-temperature environments, offering exceptional mechanical properties, including a yield strength of 250 MPa and tensile strength up to 450 MPa. These flanges provide excellent weldability, toughness, and resistance to brittle fracture at low temperatures. The advantages include reliability in critical applications, corrosion resistance, and durability, making them ideal for industries like oil and gas, petrochemicals, and power generation.
| Size | 1/2″ TO 4″ |
| Range | 15 NB TO 100 NB IN 3000 LBS, 6000 LBS, 9000 LBS |
| Grade | ASTM / ASME A105/ A105N/ A694 F42/46/52/56/60/65/70 / A350 LF3/ A350 LF2 |
| Pressure Rating | 2000#, 3000#, 6000#, 9000# |
| Class | 150#, 300#, 400#, 600#, 900#, 1500# & 2500#. |
| Type | Socketweld Fittings, Screwed-Threaded Fittings |
| Form | Tee, Union, Full Coupling, Half Coupling,Elbow 45 Deg & 90 Deg, Swage Nipple, Cross, Cap, Plug Bush |
|
Element |
Composition |
|
Carbon, max |
0.30 |
|
Manganese |
0.60 – 1.35 |
|
Phosphorus, max |
0.035 |
|
Sulfur, max |
0.040 |
|
Silicon [Note A] |
0.15 – 0.30 |
|
Nickel |
0.40 max [Note B] |
|
Chromium |
0.30 max [Note B,C] |
|
Molybdenum |
0.12 max [Note B,C] |
|
Copper |
0.40 max [Note B] |
|
Columbium |
0.02 max [Note B] |
|
Vanadium |
0.08 max |
| PROPERTIES | Imperial |
|---|---|
| TS Min psi (Mpa) | 70,000 (485) |
| YS Min psi (Mpa) | 36,000 (250) |
| EL (2″ Min) | 22% |
| RA Min | 30% |
| Hardness, Bhn | Max 197 |
| -50ºF Charpy | Min Impact |
| Energy F t/Lb (J):- | |
| Set of 3 Specimen* | 15 (20) |
| For One Specimen | 12 (16) |
Our carbon steel RTJ flanges are constructed from premium forged carbon steel, offering outstanding tensile strength, yield strength, and stability under high pressure and temperature. The RTJ groove is meticulously machined to ensure the metal ring gasket seats perfectly, allowing for safe and reliable sealing in critical applications. Through rigorous inspection and testing, we make sure that the mechanical and dimensional properties not only meet but often exceed our clients’ specifications and industry standards.
Carbon Steel A350 LF2 Flanges are commonly used in low-temperature applications across industries that require robust, reliable connections. These flanges are ideal for the oil and gas, petrochemical, and power generation sectors, where they ensure leak-proof, secure joints in pipelines and pressure systems. They are also used in cryogenic processing, water treatment plants, and heavy-duty machinery, providing stability and resistance to brittle fracture under extreme conditions. A350 LF2 flanges are essential in systems where durability and performance are crucial for safe and efficient operation.
These carbon steel RTJ flanges find their place in various industries, including oil & gas, petrochemical, power generation, water treatment, and offshore installations. They are perfect for pipe connections, valve interfaces, equipment isolations, and hot or high-pressure systems where enhanced sealing reliability is essential. Plants and projects throughout Canberra and Australia trust our carbon steel RTJ flanges for their durability, compliance, and long-lasting performance.
We are renowned for delivering products with precise, accurate dimensions. Each product undergoes thorough testing, both destructive and non-destructive, to ensure quality before being shipped to our customers.
Our team is ready to assist you. Contact us for any queries or personalized solutions.
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