Global supplier of precision-engineered hot forged flanges with fast bulk-order fulfillment.
When your projects demand unmatched strength and reliability, the products deliver. Engineered through advanced hot-forging technology, these flanges provide superior grain structure and mechanical performance, making them ideal for high-pressure pipelines, power plants, and offshore drilling systems. At Xi’An QinSteel Trading Co., Ltd, we combine ASME and API-certified manufacturing with rapid global delivery to keep your operations running smoothly.
| STANDARD | TYPE | SIZE | PRESSURE |
| ASME B16.5 | WN, SO, SW, BLD, THREADED, LP | 1/2" ~ 24" | CLASS 150 ~ 2500 |
| ASME B16.36 | WN, SO, THREADED | 1/2" ~ 24" | CLASS 300LB ~ 2500 |
| ASME B16.47 | WN BLD | 26" ~ 60" | CLASS 75 ~ 900 |
| ASME B16.48 | SPECTACLE BLANKS, SPADES, RING SPACERS | 1/2" ~ 24" | CLASS 150 ~ 2500 |
| AWWA C207 | STEEL RING, BLD, STEEL HUB | 4" ~ 96" | 86 ~ 275 PSI |
| API 6A | WN, BLD, THREADED, INTEGRAL, TEST | 2-1/16" ~ 20-3/4" | 13.8 MPa ~ 138.0 MPa |
| API 605 | WN | 26" ~ 60" | CLASS 150 ~ 900 |
| SANS 1123 | WN, PLATE, SCREWED, SO, LOOSE, BLANK, INTEGRAL | N 10 ~ 3600 | 250 ~ 4000 kPa |
| AS 2129 | BLD, PLATE, BOSS, WN | DN15 ~ 1800 | TABLE A ~ TABLE T |
| BS 3293 | SO, WN | 26" ~ 48" | CLASS 150 ~ 600 |
| BS 4504 | PLATE, LOOSE, BLANK, WN, SO, THREADED, WO PLATE, INTEGRAL | DN 10 ~ 4000 | PN 6 ~ 40 |
| EN 1092-1 | PLATE, LOOSE, BLIND, WN, SO, THREADED, WO PLATE, INTEGRAL | DN 10 ~ 3600 | PN 6 ~ 400 |
| JIS B2220 | SOP, SOH, SW, WN, LJ, TR, IT, BL | DN 10 ~ 1500 | 5 ~ 63 K |
| MSS SP-44 | BLD, WN | 12" ~ 60" | CLASS 150,19.6bar ~ CLASS 900, 153.1 bar |
Crafted from ASTM A105/A105N carbon steel, our Hot Forged Flanges resist deformation under extreme stress. Custom materials like stainless steel and alloy variants are available for corrosive or high-temperature environments.
✅ GMP-Certified Facility: Every flange undergoes ultrasonic testing and hardness checks.
✅ Global Certifications: ISO 9001, CE, PED, and API monogram compliance.
✅ Agile Production: Scalable from 500 to 10,000 units/month.
✅ 24/7 Support: Expert guidance on installation and material selection.
We guarantee 100% material traceability and dimensional accuracy through:
Flanges are packed in shock-resistant wooden crates with anti-rust coatings. Partnered with trusted freight forwarders for damage-free delivery to North America, Europe, and the Middle East.



Q: Can you make flanges outside standard sizes?
A: Absolutely! We specialize in custom dimensions and facing types (RF, RTJ, etc.).
Q: Are your flanges suitable for offshore oil rigs?
A: Yes. Our NACE-compliant flanges resist seawater corrosion.
Q: What's the lead time for urgent orders?
A: Stocked items ship in 7–10 days. Custom orders take 3–5 weeks.
Q: Do you provide material certificates?
A: Yes. Each order includes full Mill Test Reports (MTRs).
📧 Email: info@sxqinsteel.com
Trusted by oil giants, power plants, and marine engineers worldwide – let’s build resilient systems together with precision Hot Forged Flanges.
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