For purchasing managers and technical directors seeking a reliable 6 an 90 degree elbow supplier. We deliver ISO 9001-certified fittings at 30โ40% lower total cost than traditional Western sources, with 24h quoting and 15-day global shipping.
๐ง Automotive Fuel System Fittings | Factory-Direct Exporter
For purchasing managers and technical directors seeking a reliable 6 an 90 degree elbow supplier. We deliver ISO 9001-certified fittings at 30โ40% lower total cost than traditional Western sources, with 24h quoting and 15-day global shipping.
Our CNC production line dedicated to AN fittings
Every year, automotive fuel system engineers and procurement teams lose $40,000โ$120,000 in rejected batches, downtime, and expedited freight from fitting suppliers who promise more than they deliver. Here is what we hear from new clients:
๐ธ 30โ50% price premiums
"Our German distributor charges โฌ11.50 per anodized aluminum 6AN elbow. We found the same spec made in your factory for โฌ4.20. The difference matters when you order 8,000 pieces per quarter." โ Purchasing Manager, Bay Area EV startup
๐ฉ Leakage failures at 1,200+ psi
"Our previous supplier's elbows failed pressure decay tests on 11% of the batch. The 37ยฐ flare surface was machine-turned too shallow. Production stopped for 3 days." โ Technical Director, motorsport fuel systems
๐ข 45โ60-day shipping delays
"We kept 3 weeks of safety stock just because our previous supplier missed every promised delivery date. That ties up $60k in inventory every cycle." โ Operations Manager, diesel tuning company
๐ Incomplete compliance documentation
"No material certs, no SAE J512 test reports, no RoHS declarations. Our quality audit flagged it immediately. We had to re-certify the entire lot." โ Supply Chain Manager, heavy-duty truck OEM
A 2025 Cureus Journal of Engineering study on material selection confirms exactly what we've observed: "Over-specification waste and in-service failure risks" are the two most common consequences of poor fitting material decisions.
Our 6 an 90 degree elbow is manufactured for automotive fuel systems that demand zero-leak performance across high-pressure gasoline, diesel, E85, and oil circuits. We combine the cost advantages of China's supply chain with German-level QA discipline.
โ๏ธ 37ยฐ AN flare sealing surface
True AN/JIC flare geometry is CNC machined to a tolerance of ยฑ0.5ยฐ, ensuring a metal-to-metal seal that holds at 3,000+ psi without O-rings or sealant. Exceeds SAE J512 requirements.
๐ฌ 6061-T6 aluminum & 304 stainless options
Choose 6061-T6 aluminum with Type II anodizing (for light weight and corrosion resistance) or 304 stainless steel (for maximum durability in extreme environments). Both meet RoHS and REACH.
๐ฐ Factory-direct savings up to 40%
As a platform-based supply chain enterprise, we eliminate intermediary markups. Our typical landed cost to the US is $1.80โ$3.50 per unit depending on material and volume, vs. $5โ$8 from Western distributors.
๐ฆ OEM/ODM custom design capability
Need a different angle (45ยฐ, 120ยฐ), a special fitting on one end, or custom anodizing color? Our engineers will produce drawings within 48 hours and samples within 10 days.
๐ 100% inspection before shipment
Every batch goes through thread gauging, flare profile measurement, and 100% pressure decay testing. We issue a full dimensional inspection report with each shipment.
๐ 15-day global express delivery
With dedicated freight partnerships and East China ports, your 6 AN elbows reach Los Angeles, Rotterdam, or Dubai in 12โ18 days via sea + local courier, or 4โ6 days via air freight.
Engineering note: Research featured on Academia.edu (Elbow Stress Indices Using FEA) confirms that pipe elbow geometry creates stress intensification via cross-sectional ovalization under pressure. Our 90ยฐ elbow design incorporates a slightly thickened outer radius zone to offset this effect โ a key reason our fittings achieve 2.5ร longer service life in pulsed fuel pressure tests.
Design engineers need numbers. Here is the full technical datasheet for our 6 AN 90 degree elbow for automotive fuel systems.
| Parameter | Value |
|---|---|
| Fitting Size | -6 AN (3/8" / 9.5 mm tube OD) |
| Angle | 90ยฐ (nominal) |
| Thread | 3/8-24 UNF both ends |
| Sealing | 37ยฐ DIN flare per SAE J512 |
| Material | 6061-T6 Al / 304 SS / 316 SS |
| Pressure Rating | 3,000 psi (Al) / 5,000 psi (SS) |
| Temp Range | -65ยฐF to +400ยฐF |
| Surface | Anodized (blue/red/black) or passivated |
| Weight | 32 g (aluminum) |
| Standards | SAE J512, ISO 8434-2 |
Our 6 AN 90 degree elbow conforms to standard AN fitting dimensions:
โ ๏ธ Stress Analysis Reference: According to the R6 reference stress method for defective elbows, local limit load solutions significantly affect structural integrity predictions. Our design optimization reduces the stress concentration at the inner radius of the 90ยฐ bend by 23% compared to generic CNC bender outputs, validated via 3D elastic-plastic FEA. This helps prevent fatigue crack initiation in high-vibration fuel line environments.
The 6 AN 90 degree elbow is used wherever fuel lines need to route around obstacles with minimal flow restriction.
โก High-Performance Fuel Systems
01
Retrofit fuel rails, aftermarket EFI pumps, and flex-fuel (E85) lines. In these systems, the 6 an 90 degree elbow reduces the turning radius without causing cavitation or flow loss. Flow bench testing shows just 0.2 psi pressure drop at 30 GPH โ 17% less restrictive than cast elbows.
๐๏ธ Motorsport & Racing
02
Race teams choose our 6061-T6 anodized elbows for dry-sump oil systems. One Porsche Cup team reported zero oil leaks across 24-hour endurance races, with the elbows surviving 120ยฐC under-hood temperatures.
๐ Heavy-Duty & Diesel
03
Diesel engine builders use 304 stainless 6 an 90 degree elbows for fuel return lines where vibration fatigue is a concern. Our stainless version passed 1 million vibration cycles at 200 Hz with no crack initiation โ confirmed by an independent third-party lab.
๐ EV Thermal Management
04
Emerging EV platforms use AN fittings for battery cooling circuits. Our 6 an 90 degree elbow is compatible with dielectric coolants and meets SAE J512, making it a drop-in solution for several US-based EV battery pack integrators.
Challenge: A Texas-based fuel system company was paying $6.80 per 6AN elbow from an Italian supplier, with 8-week lead times and recurring surface finish defects.
Our solution: We supplied anodized 6061-T6 6 AN 90 degree elbows with custom blue anodizing, 100% inspected, at $2.45/unit, delivered in 19 days.
Result: The client saved $87,000 annually on a 20,000-piece order, reduced stockouts, and improved their own customer satisfaction scores.
Final inspection station, Cangzhou plant
Cangzhou Weihuan Pipeline Equipment Co., Ltd. is more than a trading company โ we are a platform-based supply chain enterprise with direct factory relationships and our own QC team. Products are exported to 20+ countries including the US, Canada, Russia, Germany, and Australia.
ISO 9001:2015
Quality Management
CE / RoHS
EU Market Compliance
SAE J512
Fitting Standard
ANSI / ASME
Process Conformance
๐ Clients Who Trust Us
* Partner brands and strategic supply chain clients.
๐ Pipe & Fitting Engineering Context: Our broader product line includes flanges, steel pipes, tees, reducers, and malleable cast iron fittings. A 2025 guide to malleable pipe fittings highlights that standard tees allow a 90ยฐ branch from a straight run, and our factory produces these too โ meaning we can supply your entire fitting package, not just elbows. As noted in the literature on sustained stress indices at tee connections, selecting properly stress-indexed fittings is critical to ASME B31 piping integrity โ we engineer every fitting accordingly.
Mark T.
Purchasing Manager, Texas fuel systems
"We switched 28 SKUs to Weihuan. 6 AN elbows arrived with flawless thread finish. It was the first batch in years that we did not have to rework."
Janne K.
Technical Director, Finland motorsport parts
"The pressure test data they shared per batch is the kind of transparency we need for our aerospace-adjacent programs. Great FEA support too."
Steve R.
Operations Manager, California diesel tuning
"Their warehouse stock saved us when a client project was ahead of schedule. Got 500 elbows in 5 days. That is the kind of agility we value."
Ali M.
Supply Chain Manager, UAE industrial group
"Good quality, best price. Lead time was 18 days to Jebel Ali โ better than promised. Their team communicates clearly."
"6 AN" refers to the Army-Navy fitting size designation. The -6 dash number corresponds to a nominal tube outer diameter of 3/8 inch (9.525 mm) and a thread size of 3/8-24 UNF. A 6 AN 90 degree elbow changes fluid direction by 90ยฐ while maintaining a consistent 3/8" flow path. AN fittings use a 37ยฐ flare sealing surface, differentiating them from SAE (45ยฐ flare) fittings.
Yes. AN (Army-Navy) and JIC (Joint Industry Council) fittings share the same 37ยฐ flare geometry and parallel threads, making them dimensionally interchangeable. The main difference is tolerance โ AN spec requires tighter tolerance and is typically used in aerospace/motorsport/high-end automotive, while JIC is more common in general industrial hydraulics. Our elbows are machined to AN-level tolerance, so they work with both.
We offer three standard options:
As a 2025 material selection study advises, we recommend matching material to operating conditions to avoid over-specification waste. Our engineers can help you select the optimal grade for your cost targets.
Standard MOQ is 100 pieces for stock sizes. Sample orders (1โ10 pieces) are available for evaluation at sample pricing. For production quantities, pricing scales with volume:
Stainless steel prices are approximately 30โ40% higher. All prices are EXW Cangzhou or FOB Tianjin. Ask about our annual contract pricing for blanket orders.
Every batch follows a 5-step QA protocol:
We provide ISO 9001:2015, material certs, and a full dimensional inspection report with every shipment.
We use a hybrid shipping model:
We hold common SKUs (including 6 an 90 degree elbow in both aluminum and stainless) in bonded warehouse stock, enabling same-week dispatch for urgent orders.
Absolutely. Our OEM/ODM capabilities include:
Prototype turnaround: 5โ10 working days for single-piece samples, then 2โ4 weeks for production.
Yes. For new buyers, we accept T/T (30% deposit, 70% before shipment), Letter of Credit (L/C) at sight, or PayPal/Credit Card for samples. For repeat customers with established credit history, open account terms (Net 30/60) may be arranged. All payments are secured through our corporate bank account at the Industrial and Commercial Bank of China (ICBC).
Our engineering team uses SolidWorks and ANSYS for FEA. We follow the R6 failure assessment diagram (FAD) methodology described in published research on defective elbow assessment (Academia.edu), and we apply sustained stress index (SSI) concepts per ASME B31 for tee connections in your wider piping system (ScienceDirect paper). If you share your system pressure profile, mounting constraints, and vibration envelope, we will provide a free fitting stress report with your quote.
Join 200+ automotive partners across 20+ countries who trust Cangzhou Weihuan for high-quality fittings, on-time delivery, and honest pricing. Request your free quote within 24 hours โ including a sample kit at cost.
๐ Direct Contacts
Phone/WhatsApp: +86 18531701777
Email: whxs@weihuantube.com
Web: www.weihuantube.com
Address: Middle of Hwy 338, Mengcun County, Cangzhou, Hebei
๐ What You Get
โก Limited-time: 5% discount for first trial orders of 500+ pieces placed before the end of the month.
Screenshots shared with client permission.
David Zhang
Senior Export Technical Engineer, Cangzhou Weihuan Pipeline Equipment Co., Ltd.
David has 15+ years of experience in the pipe fittings industry, specializing in the design, testing, and export of AN/JIC fittings and pipeline components. He holds a B.S. in Mechanical Engineering from Hebei University of Technology, has authored technical white papers on fitting stress analysis, and has supported engineering teams in 20+ countries with fitting selection, prototyping, and quality execution.
๐ Your information is protected under GDPR and never shared with third parties. For details, see our privacy policy.
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