sae threaded & non threaded pipe flange for plumbing | Factory

SAE Threaded & Non Threaded Pipe Flange for Plumbing: Factory Specifications, Sizing & Compliance

Solve your piping connection challenges with precision-engineered SAE threaded flanges and non threaded pipe flanges — built for plumbing systems, hydraulic applications, and industrial pipelines demanding leak-free performance.

Trusted by procurement managers, technical directors & operations teams in 20+ countries

📐 Engineering Insights from Published Research

According to "Simplified Nonlinear Dynamic Model for Pipe Structures with Bolted Flange Joints" (Luan Y, Guan ZQ, et al., Journal of Sound and Vibration, 2012), the contact behavior at flange interfaces significantly affects system-level dynamic response. Their reduced-order modeling approach, validated with full-contact simulations, highlights the necessity of precision-machined flange faces — a principle we apply in every batch.

Similarly, "Sustained Stress Indices at Tee Connections in Piping Systems" (International Journal of Pressure Vessels and Piping, 2021) underscores how ASME B31 code calculations rely on precise stress intensification factors at fittings. Properly torqued, dimensionally accurate flanges eliminate the bracing and stress concentration effects that cause premature failure.

The Cureus Journal of Engineering (2025) paper on "Performance Material Selection in Rigid Flange Coupling Systems" provides a decision matrix for material selection based on operating conditions. We use this same matrix to recommend between A105 and 316L — reducing over-specification waste by an average of 15% for clients.

✅ Certifications & Regulatory Compliance

RoHSCEISO 9001:2015PED 2014/68/EU

All products are manufactured in compliance with ANSI/ASME B16.5, SAE J518, ISO 6162, DIN EN 1092-1. Material test certificates (MTC) available per EN 10204 3.1.

🌍 Clients Who Trust Weihuan Flanges

+ 20 countries served

1. What is the difference between SAE threaded and non threaded pipe flanges?

SAE threaded flanges feature factory-cut NPT, BSP, or SAE O-ring boss threads that allow direct screw-on connection to threaded pipe or fittings, primarily used in hydraulic systems rated from 3,000 to 6,000 psi. Non threaded pipe flanges have a plain bore designed for welding, brazing, or slip-on installation and are more common in industrial plumbing and process piping per ASME B16.5.

2. What pressure ratings do your SAE threaded flanges support?

Our SAE J518 flanges are available in Code 61 (3,000 psi) and Code 62 (6,000 psi) series. For non threaded pipe flanges, ratings range from 150# to 900# depending on material and operating temperature. Full pressure-temperature charts available on request.

3. Do you offer ODM/OEM customization for flange dimensions?

Yes. Our factory in Cangzhou, Hebei Province, provides custom threading, specialized face finishes, and non-standard bolt circle drilling. OEM branding on flange faces is available with a minimum order quantity of 200 pieces. Lead time is typically 14–21 days for custom runs.

4. What packaging and logistics methods do you use for international shipping?

Flanges are individually protected with rust-preventive oil, wrapped in kraft paper, and packed in plywood crates or steel pallets. For US/Europe orders, we use FOB Tianjin/Xingang, CIF, or DDP terms. Sea freight typically takes 25–35 days; air freight 5–7 days. Our logistics team coordinates consolidation to minimize your landed costs.

5. What material certifications can you provide?

Every shipment includes an EN 10204 3.1 material test certificate with chemical composition and mechanical properties. Additional third-party inspections (SGS, BV, TÜV) can be arranged at the buyer's request. Our ISO 9001:2015 quality management system ensures full traceability from raw material to finished flange.

6. Can you provide free samples before bulk order?

Yes. We supply free samples for qualified B2B clients — buyer covers express shipping cost (DHL/FedEx/UPS). Sample production typically takes 3–5 days. Most clients approve the sample quickly and proceed with container orders, as our sample quality exactly matches production quality.

7. What payment terms do you accept?

We accept T/T (30% deposit, 70% against B/L copy), L/C at sight, and D/P for international orders. For long-term contract buyers, we can discuss open account terms after 3+ successful transactions. All payments are processed with complete invoicing documentation.

✍️ About the Author

Frank Liang — Senior Industrial Piping Systems Consultant at Cangzhou Weihuan Pipeline Equipment Co., Ltd.

With 15+ years in flange and pipe fitting manufacturing, Frank has consulted on pipeline projects across the USA, Europe, and the Middle East. He specializes in material selection, hydraulic system design, and international compliance (SAE, ASME, ISO). His technical articles have been referenced in industry procurement guides.