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.
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
1️⃣ SAE Threaded vs Non Threaded Flange: Core Differences
2️⃣ Technical Specifications & Dimensions
3️⃣ Material Grades & Performance Data
4️⃣ Manufacturing & Quality Assurance
5️⃣ Applications & Case Studies
6️⃣ Certification & Compliance
7️⃣ FAQ: Procurement & Logistics
8️⃣ Customer Reviews & Trust Signals
9️⃣ Contact & Quote Request
Procurement teams and plant operators across the USA and Europe face a familiar set of challenges when sourcing flanges for plumbing and hydraulic systems.
Traditional import channels add 24–38% markup through intermediaries. A standard SAE threaded flange priced at $4.80 in China may arrive at $7.50–$9.20 after trading company margins.
Non threaded pipe flanges with poor surface finish (Ra > 3.2 µm) and out-of-tolerance bolt circles account for 41% of joint leakage incidents in hydraulic systems, according to field failure data.
Split shipments, delayed consolidation, and poor crate packing inflate landed costs by up to 17%. One automotive plant in Ohio reported $22,000 in emergency air-freight charges for mis-specified flanges.
🔍 Reality check: A 2025 industry survey of 200 US-based plumbing contractors found that 68% had experienced on-site joint failures attributed to substandard flange manufacturing.
As a platform-based supply chain management enterprise, Cangzhou Weihuan Pipeline Equipment Co., Ltd. delivers precision-machined flanges with full traceability — from raw material heat numbers to final dimensional inspection.
Conforming to SAE J518 / ISO 6162 standards, available in Code 61 and Code 62 series. Each flange features precision-cut NPT or SAE straight threads with 0.8–1.6 µm surface finish on sealing faces.
Pressure rating up to 6,000 psi (Code 62)
Thread sizes: 1/2" to 2" NPT/BSP
Materials: Carbon steel, 304/316 stainless
Zinc-plated or black oxide finish
For welded or slip-on configurations, our non threaded pipe flanges meet ASME B16.5 and DIN EN 1092-1 standards. Available with flat face (FF), raised face (RF), or ring-type joint (RTJ) sealing profiles.
Pressure classes: 150# to 900# (PN16 to PN160)
Size range: DN15 to DN600 (1/2" to 24")
Forged or plate steel construction
RF surface finish: 125–250 µin Ra (ASME B16.5)
| Specification | SAE Threaded Flange (J518) | Non Threaded Flange (B16.5) |
|---|---|---|
| Pressure Class | Code 61: 3,000 psi Code 62: 6,000 psi | 150# to 900# |
| Size Range | 1/2" – 2" | DN15 – DN600 |
| Thread Standard | NPT, BSP, SAE O-ring boss | N/A (welded / slip-on) |
| Material Grades | A105, 304, 316L, F11 | A105, A350 LF2, 304/316L, F51 Duplex |
| Sealing Face Finish | Ra 0.8 – 1.6 µm | 125 – 250 µin Ra |
| Bolt Hole Tolerance | ±0.5 mm | ±0.25 mm (ASME B16.5) |
| Certifications | ISO 9001, CE, RoHS | ISO 9001, CE, PED, ABS |
Ideal for general plumbing, water supply, and hydraulic systems. Yield strength: 250 MPa. Maximum operating temperature: 425°C. Cost-effective for standard-duty applications.
Best for: Mild service, budget-conscious projects
Superior corrosion resistance for chemical and marine plumbing. 316L adds 2–3% molybdenum improving pitting resistance by 4x in chloride environments. Operating range: -196°C to 800°C.
Best for: Corrosive media, food-grade, offshore
SAE threaded flanges in Code 62 series provided zero-leak sealing for a 3,000-ton hydraulic press in Germany. 38% fewer connection points compared to NPT assemblies.
Non threaded pipe flanges (DN50-DN300, RF face) used in a Las Vegas hotel complex. Flange joint failure rate: 0.2% over 18 months across 5,300 joints.
Duplex F51 non threaded flanges supplied for a North Sea platform. Optimized sealing geometry per Brođogradnja 75(2)2024 improved contact pressure by 22% while reducing equivalent stress.
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.
RoHSCEISO 9001:2015PED 2014/68/EUAll 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.
+ 20 countries servedSAE 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.
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.
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.
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.
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.
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.
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.
James T.
Purchasing Manager, Texas USA
"We switched from a domestic distributor to Weihuan's factory-direct SAE threaded flanges. Per-unit cost dropped 31% for Code 62 series. The 3.1 MTC and consistent thread gauging made QC approval effortless. Now on our Approved Vendor List."
Michael van den Berg
Technical Director, Netherlands
"The non threaded pipe flanges we ordered for our hydraulic test benches arrived with perfect surface finish (Ra 1.2 µm) and bolt-hole alignment within ±0.2mm. Zero leaks in 14 months of 24/7 operation. Their team understands engineering requirements."
Sarah O'Connell
Operations Manager, UK
"Shipping consolidation was a big win for us. Weihuan combined our flange, elbow, and tee order into one 20ft container — reducing freight cost by 19%. Lead time was 5 days faster than quoted. Highly reliable supply chain partner."
David K.
Supply Chain Director, Germany
"We audited 9 Chinese flange suppliers and chose Weihuan for their ISO 9001 certification, traceable raw materials, and responsive technical support. They supported our DDP shipment to Hamburg flawlessly and compliance paperwork was perfect."
Andres M.
E-commerce Seller, Spain
"As an Amazon Business seller, I need consistent quality and fast restocking. Weihuan's 18-day lead time from order to warehouse has helped us maintain 97% in-stock availability. Their team even helped with product certifications for the EU market."
Quote request for SAE Code 62 flanges
Sample approval confirmation
Shipping & delivery status update
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.
Get a factory-direct quote within 24 hours. Free samples for qualified buyers. Request your FREE technical spec sheet now.
📌 Address: Middle section of National Highway 338, Mengcun Hui Autonomous County, Cangzhou City, Hebei Province, China
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