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Engineered for the most demanding environments in high-pressure transmission lines, our A/SA694-F70 Welding Neck Flange offers superior integrity and durability. Designed specifically for the oil and gas industry, this flange combines high-yield strength carbon steel with a robust Ring Type Joint (RTJ) facing, ensuring a leak-proof seal even under the extreme stress of Class 900# applications.
Fully compliant with NACE MR0175 (ISO 15156), this product is certified for Sour Service, making it the primary choice for pipelines handling hydrogen sulfide ($H_2S$) containing fluids where resistance to sulfide stress cracking is critical.
Key Features:
| Element | F42 Content, % | F52 Content, % | F60 Content, % | F65 Content, % | F70 Content, % |
| Carbon (C) | 0.13~0.20 | 0.16~0.22 | 0.17~0.23 | 0.17~0.23 | 0.06~0.10 |
| Silicon (Si) | 0.20~0.40 | 0.15~0.40 | 0.15~0.40 | 0.15~0.40 | 0.20~0.40 |
| Manganese (Mn) | 1.20~1.60 | 1.10~1.40 | 1.20~1.50 | 1.30~1.60 | 1.10~1.40 |
| Phosphorous (P) | ≤ 0.030 | ≤ 0.025 | ≤ 0.020 | ≤ 0.025 | ≤ 0.020 |
| Sulfur (S) | ≤ 0.020 | ≤ 0.012 | ≤ 0.012 | ≤ 0.015 | ≤ 0.010 |
| Molybdenum (Mo) | 0.20~0.35 | 0.45~0.60 | 0.45~0.65 | 1.20~1.70 | |
| Nickel (Ni) | ≤ 0.30 | ≤ 0.50 | 0.40~1.00 | ≤ 0.30 | 0.20~0.40 |
| Chromium (Cr) | ≤ 0.30 | ≤ 0.30 | ≤ 0.25 | ≤ 0.30 | ≤ 0.30 |
| Copper (Cu) | ≤ 0.25 | ≤ 0.25 | ≤ 0.25 | ≤ 0.25 | ≤ 0.25 |
| Vanadium (V) | ≤ 0.050 | 0.02~0.06 |
| Grade | Mechanical Properties | |
|---|---|---|
| Tensile Strength (Mpa) | Yield Strength (Mpa) | |
| A | ≥48,000 (≥330) | ≥30,000 (≥205) |
| B | ≥60,000 (≥415) | ≥35,000 (≥240) |
| NCH | OD (MM) |
API 5L ASTM A53 Standard Wall Thickness | ||||||
|---|---|---|---|---|---|---|---|---|
| (mm) | (mm) | (mm) | (mm) | (mm) | (mm) | (mm) | ||
| SCH 10 | SCH 20 | SCH 40 | SCH 60 | SCH 80 | SCH 100 | SCH 160 | ||
| 1/4" | 13.7 | 2.24 | 3.02 | |||||
| 3/8" | 17.1 | 2.31 | 3.2 | |||||
| 1/2" | 21.3 | 2.11 | 2.77 | 3.73 | 4.78 | |||
| 3/4" | 26.7 | 2.11 | 2.87 | 3.91 | 5.56 | |||
| 1" | 33.4 | 2.77 | 3.38 | 4.55 | 6.35 | |||
| 1-1/4" | 42.2 | 2.77 | 3.56 | 4.85 | 6.35 | |||
| 1-1/2" | 48.3 | 2.77 | 3.68 | 5.08 | 7.14 | |||
| 2" | 60.3 | 2.77 | 3.91 | 5.54 | 8.74 | |||
| 2-1/2" | 73 | 3.05 | 5.16 | 7.01 | 9.53 | |||
| 3" | 88.9 | 3.05 | 5.49 | 7.62 | 11.13 | |||
| 3-1/2" | 101.6 | 3.05 | 5.74 | 8.08 | ||||
| 4" | 114.3 | 3.05 | 4.50 | 6.02 | 8.56 | 13.49 | ||
| 5" | 141.3 | 3.4 | 6.55 | 9.53 | 15.88 | |||
| 6" | 168.3 | 3.4 | 7.11 | 10.97 | 18.26 | |||
| 8" | 219.1 | 3.76 | 6.35 | 8.18 | 10.31 | 12.70 | 15.09 | 23.01 |
| 10" | 273 | 4.19 | 6.35 | 9.27 | 12.7 | 15.09 | 18.26 | 28.58 |
| 12" | 323.8 | 4.57 | 6.35 | 10.31 | 14.27 | 17.48 | 21.44 | 33.32 |
| 14" | 355 | 6.35 | 7.92 | 11.13 | 15.09 | 19.05 | 23.83 | 36.71 |
| 16" | 406 | 6.35 | 7.92 | 12.70 | 16.66 | 21.44 | 26.19 | 40.49 |
| 18" | 457 | 6.35 | 7.92 | 14.27 | 19.05 | 23.83 | 29.36 | 46.24 |
| 20" | 508 | 6.35 | 9.53 | 15.09 | 20.62 | 26.19 | 32.54 | 50.01 |
| 22" | 559 | 6.35 | 9.53 | 22.23 | 28.58 | 34.93 | 54.98 | |
| 24" | 610 | 6.35 | 9.53 | 17.48 | 24.61 | 30.96 | 38.89 | 59.54 |
| 26" | 660 | 7.92 | 12.7 | |||||
Q1: Are API5L/L245 PSL1 A106-B/SA106B A53-B/SA53-B pipes seamless or welded?
A: Yes, they are unequivocally seamless. The inclusion of the ASTM A106/ASME SA106B standard is the definitive indicator, as this standard exclusively covers seamless carbon steel pipe for high-temperature service.
Q2: What is the main difference between API 5L and ASTM A106?
A: API 5L is a specification focused on the transportation of oil, gas, and water in pipeline systems. ASTM A106 is designed for piping systems that operate at high temperatures (typically above 750°F / 400°C). A pipe meeting both standards is exceptionally versatile for interconnected systems.
Q3: Can I use this pipe for high-pressure steam service?
A: Absolutely. The compliance with ASTM A106/SA106B Grade B makes these seamless steel pipes an excellent and commonly used choice for high-pressure steam and other high-temperature fluid conveyance.
Q4: What does the "PSL1" in API5L L245 PSL1 mean?
A: PSL stands for "Product Specification Level." PSL1 defines the standard mandatory requirements for chemical composition, mechanical properties, and testing. PSL2 has more stringent requirements (e.g., tougher impact testing). PSL1 is suitable for the vast majority of general pipeline applications.
Kasugai Group supply pipe fittings,steel pipes and flanges products for 100 years,If you want to know more about our piping products,please email us:zhangying@kasugai-group.co.jp
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