Carbon Steel Buttweld Fittings are widely known for their durability, strength, and adaptability in high-pressure and high-temperature environments. These fittings, manufactured from ASTM A234 WPB, WPC, and WPL6 grades, are available in a size range of ½” to 48” nominal pipe size (NPS) and various schedules, such as SCH 40, SCH 80, SCH 120, and SCH XXS. Carbon steel buttweld fittings, including elbows, tees, reducers, and caps, are fabricated to ASME B16.9 standards, ensuring dimensional accuracy and superior welding compatibility for seamless and welded pipe systems. They are extensively used in oil and gas, petrochemical, and power generation industries.
Carbon Steel Forged Fittings, including threaded and socket weld variants, offer exceptional mechanical properties, making them suitable for rigorous applications. Manufactured as per ASME B16.11 standards and available in pressure classes 3000#, 6000#, and 9000#, these fittings are crafted using high-quality materials like ASTM A105 and A350 LF2 for enhanced performance in low and ambient temperatures. Common types include elbows, tees, couplings, and plugs, which ensure leak-proof connections in high-pressure pipelines. These fittings find their use in critical sectors such as refineries, chemical plants, and shipbuilding.
Carbon Steel Flanges, designed to ASME B16.5 and ASME B16.47 specifications, are pivotal for bolted connections in pipeline systems. Available in grades like ASTM A105 and A694 F42 to F70, they range from ½” to 48” in diameter. Types such as slip-on, weld neck, blind, and socket weld flanges are fabricated to withstand extreme pressures and temperatures. They are extensively employed in fluid transportation systems, especially in industries like water treatment and natural gas distribution, due to their exceptional strength and ability to resist deformation under high stress.
Carbon Steel Pipe Spools are pre-fabricated pipe sections equipped with flanges, fittings, and pipe lengths to streamline on-site assembly. Customizable to client specifications and project requirements, these spools are manufactured as per ASME B31.3 and ASTM A106 Grade B standards for process piping applications. Their robust construction ensures efficient handling of high-pressure and high-temperature fluids, making them ideal for power plants, chemical industries, and marine systems. Pipe spools are designed to accommodate varying configurations, ensuring seamless integration with piping systems and reducing installation time.
Carbon steel, with its exceptional tensile strength, cost-efficiency, and versatility, remains a cornerstone material for manufacturing buttweld fittings, forged fittings, flanges, and pipe spools, catering to diverse industrial requirements.
Carbon steel equivalents vary slightly based on manufacturing processes and specific regional standards.
Grades like A694 (F42 to F70) are generally used for high-strength flanges and fittings in high-pressure applications.
Equivalent grades in DIN and EN standards are approximate; further checks may be required for critical applications.
Material Grade
Carbon (C)
Manganese (Mn)
Phosphorus (P)
Sulfur (S)
Silicon (Si)
A105
0.35 max
0.60–1.05
0.035 max
0.040 max
0.10–0.35
A234 WPB
0.30 max
1.00 max
0.050 max
0.058 max
0.10 min
A333 Grade 6
0.30 max
0.29–1.06
0.025 max
0.025 max
0.10 min
A350 LF2
0.30 max
0.60–1.35
0.035 max
0.040 max
0.15–0.30
A516 Grade 70
0.28 max
0.79–1.30
0.030 max
0.030 max
0.15–0.40
A694 F42
0.23 max
1.35 max
0.025 max
0.025 max
0.15 max
A694 F46
0.23 max
1.35 max
0.025 max
0.025 max
0.15 max
A694 F52
0.23 max
1.35 max
0.025 max
0.025 max
0.15 max
A694 F60
0.23 max
1.35 max
0.025 max
0.025 max
0.15 max
A694 F65
0.23 max
1.35 max
0.025 max
0.025 max
0.15 max
A694 F70
0.23 max
1.35 max
0.025 max
0.025 max
0.15 max
The chemical composition values are approximate and represent typical ranges or limits for these materials.
Carbon Steel grades like A105, A234 WPB, A350 LF2, and A516 are widely used in fittings and flanges.
Specifications such as A694 grades (F42–F70) are engineered for high-pressure pipeline applications, requiring enhanced mechanical strength and impact properties.
Material Grade
Tensile Strength (MPa)
Yield Strength (MPa)
Elongation (%)
Hardness (HB)
A105
485 min
250 min
22 min
187 max
A234 WPB
485 min
240 min
22 min
197 max
A333 Grade 6
415 min
240 min
20 min
Not Specified
A350 LF2
485 min
250 min
22 min
197 max
A516 Grade 70
485–620
260 min
21 min
200 max
A694 F42
415 min
290 min
20 min
190 max
A694 F46
440 min
315 min
20 min
190 max
A694 F52
515 min
360 min
20 min
200 max
A694 F60
565 min
415 min
20 min
200 max
A694 F65
615 min
450 min
19 min
220 max
A694 F70
655 min
485 min
19 min
220 max
Tensile Strength: The maximum stress the material can withstand while being stretched or pulled.
Yield Strength: The stress at which a material begins to deform plastically.
Elongation: The percentage increase in the gauge length after the material is fractured.
Hardness: Resistance of the material to indentation or scratching.