E-mail: authentic013@steelpipes-fitting.com
WhatsApp: +86 13668807131
E-mail: authentic013@steelpipes-fitting.com
WhatsApp: +86 13668807131
Feb. 02, 2026
Flanges are the "connection points" of piping systems. Inferior flanges often lead to leaks and maintenance problems.
1. Flange Types
Common choices include:
Weld neck flanges → Highest strength, high pressure resistance
Slip-on flanges → Economical, easy to install
Blind flanges → Used for sealing pipe ends
Threaded flanges → Suitable for small or low-pressure systems
For critical pipelines, weld neck flanges are usually the most reliable choice.
2. Pressure Rating
Always select flanges that match the pressure rating:
150 / 300 / 600 / 900 / 1500 / 2500 grades
Flanges with insufficient pressure ratings may deform or leak under load.
3. Surface Finish
Sealing performance depends on the surface finish:
RF (Raised Face) – Most common
FF (Flat Face) – Suitable for low-pressure environments
RTJ (Hot Rolled-Hot Rolled) – Suitable for high-pressure and high-temperature environments
Correct surface finish = Better sealing performance = Fewer downtimes Common Buyer Mistakes
Based on our experience serving global distributors and EPC contractors, we frequently see:
Choosing only the cheapest fittings
Ignoring standards (ASTM/ASME/DIN)
Mixing different materials
Excessive dimensional tolerances
Unstable suppliers
These typically lead to:
Installation problems
Rework
Project delays
Additional logistics costs
Sometimes, what seems like a "5% saving" can end up costing 30% more.
Cangzhou Aosendike Pipe Fittings Manufacturing Co., Ltd. is a large-scale manufacturer specializing in elbows, tees, reducers, and pipe caps. We can execute standards such as ASTM, ANSI, JIS, DIN, and GB, basically covering all types of steel.
For any purchasing needs or inquiries, please contact us.
Mobile: 86-13668807131
Website: https://www.authenticfitting.com/
Address: Mengcun Hui Autonomous County, Cangzhou City, Hebei Province
Email: authentic013@steelpipes-fitting.com
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Authentic is here to help you find the right pipe fittings and flanges for your specific needs.
FAQ
What certifications do your products have?
Our products comply with international standards such as ASTM, ANSI, JIS, DIN, and GB. We also hold various certifications to assure quality and reliability, including ISO 9001.
How can I get some samples?
If you need, we will offer you samples for free, but new customers are expected to pay express charge.
To which country have you supplied your products?
We have supplied to Thailand, China Taiwan, Vietnam, India, South Africa, Sudan, Peru, USA, Brazil, Trinidad and Tobago, Kuwait, Qatar, Sri Lanka, Pakistan, Romania, France, Spain, Germany, Belgium, Ukraine etc. (Figures here only include our customers in latest 5 years.)
Get Quote
Have questions or need a custom solution? Reach out to us!
Our team at Authentic is here to help you find the right pipe fittings and flanges for your specific needs.
You Can Contact Us in the Following Ways
authentic013@steelpipes-fitting.com
+86 13668807131
Donghe Industrial Zone, Mengcun County, Cangzhou City, Hebei Province
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At Authentic, we understand that every project has unique requirements. Our dedicated team is here to provide you with a customized quote tailored to your specific needs. By filling out the form below, you’ll receive competitive pricing, high-quality product details, and estimated delivery times.
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