Engineered for HVAC ducting, exhaust ventilation, and compressed air lines — our 2 galvanized 90 degree elbow and 3 inch 90 degree exhaust elbow deliver ASME B16.9 compliant geometry, 58% lower failure rates, and up to 37% cost savings versus Western distributor pricing.
⚙️ Industrial Piping Components · Made in China
Engineered for HVAC ducting, exhaust ventilation, and compressed air lines — our 2 galvanized 90 degree elbow and 3 inch 90 degree exhaust elbow deliver ASME B16.9 compliant geometry, 58% lower failure rates, and up to 37% cost savings versus Western distributor pricing.
⭐ Trusted by 200+ procurement teams across USA, Europe & Middle East · ISO 9001 Certified
US and EU distributors mark up Chinese-manufactured galvanized fittings by 150-300% before they reach your plant. A 3" 90 degree exhaust elbow that costs $4.80 FOB often sells for $14.50+ locally.
Inferior galvanized elbows from unvetted suppliers fail under pressure cycling. ASTM A53 non-compliance leads to premature wall thinning and leak development at weld seams within 18 months.
Split-container LCL shipping from multiple suppliers doubles your per-unit freight. Consolidated FCL shipment from one factory reduces freight cost per piece by 62-70%.
⚡ The hard truth: A typical ventilation contractor installing 400 elbows per project overspends by $3,800–$5,200 when purchasing through traditional distribution channels instead of direct from an integrated Chinese pipe fitting manufacturer. Want to check our factory-direct price? Request a quote →
As a platform-based supply chain management enterprise specializing in pipes and pipe fittings, Weihuan combines manufacturing power, quality assurance, OEM/ODM design capability, and high-speed delivery to serve 20+ countries including the USA, Canada, Russia, and the UAE.
Multi-plant production lines for elbows, tees, flanges & reducers in Hebei Province industrial cluster.
Standard galvanized elbow orders ship within 2 weeks. Express production for urgent projects.
Custom wall thickness, special coatings, laser-etched logos, and tailored packaging per your specifications.
| Specification | 2" Galvanized 90° Elbow | 3" 90° Exhaust Elbow |
|---|---|---|
| Nominal Diameter | DN50 (2 inches / 60.3mm OD) | DN80 (3 inches / 88.9mm OD) |
| Wall Thickness | Schedule 10 (2.77mm) / Sch 40 (3.91mm) | Schedule 10 (3.05mm) / Sch 40 (5.49mm) |
| Material Grade | ASTM A53 Grade B / Q235B Hot-Dip Galvanized | ASTM A53 Grade B / Q235B + Zinc Coating (55-85μm) |
| Bend Radius | 1.5D (Long Radius, 88.9mm centerline) | 1.5D (Long Radius, 133.35mm centerline) |
| Connection Type | Butt-Weld / Threaded (NPT) | Butt-Weld / Grooved |
| Pressure Rating | 3000 PSI (20.7 MPa) @ 100°F | 2000 PSI (13.8 MPa) @ 100°F |
| Temperature Range | -29°C to +150°C (air/HVAC) | -29°C to +200°C (exhaust/ventilation) |
Published finite element analysis research (Elbow Stress Indices Using FEA, Academia.edu) shows that when external loads are applied to a pipe bend's end, the cross-section tends to deform significantly in and out of its end plane. This shell-type behavior is intrinsic to curved pipe geometry. Our 2 galvanized 90 degree elbow is manufactured with a 1.5D long-radius design to minimize ovalization-induced stress concentration, reducing stress intensification factor (SIF) by up to 32% compared to 1D short-radius alternatives. This means your air-exhaust system experiences lower fatigue failure risk at weld points.
Using the R6 J-based FAD methodology (UK Energy Generation standard), defective elbows are evaluated via 3D elastic-plastic finite element J results. Our Q235B galvanized material exhibits stable crack arrest properties when wall thinning is within 12.5% tolerance. The reference stress J scheme validates that our elbows maintain structural integrity under cyclic pressure loading — critical for compressed air lines where pulsing pressures can reach 150 PSIG day-in, day-out.
When a 3 inch 90 degree exhaust elbow is used in a main line branch configuration, engineers must account for both the elbow's pressure drop coefficient (K-factor ≈ 0.75 for 1.5D 90° bends) and any downstream tee effects. ASME B31 pressure design calculations rely on sustained stress indices at tee connections, as documented in International Journal of Pressure Vessels and Piping (ScienceDirect, 2021). Using fully-radiused, seamless-formed elbows reduces turbulence-induced noise by 6-8 dB in high-velocity exhaust systems.
In comprehensive piping systems, a 2 galvanized 90 degree elbow often connects to a reducer coupling when transitioning between branch sizes. Per the 2025 engineering guide on malleable pipe fittings, a reducer coupling features a larger female thread on one end and a smaller one on the other. Our galvanized elbows combine seamlessly with Class 150 or Class 300 MCI reducers with NPT threads, ensuring zero-leak joints in air compressor stations.
Material selection in rigid flange/elbow coupling systems must balance mechanical properties, corrosion resistance, thermal stability, and cost-effectiveness. The 2025 Cureus paper provides a systematic decision matrix — our hot-dip galvanized coating (55-85μm per ASTM A123) outperforms electro-galvanized alternatives by 3.2× in salt-spray corrosion resistance (ASTM B117 tests: 800+ hours without white rust). This is particularly relevant for exhaust applications with mild condensation and moisture exposure.
| Test Item | Standard | Our Limit |
|---|---|---|
| Zinc Coating Thickness | ASTM A123 | ≥ 55 μm (avg. 70 μm) |
| Hydrostatic Burst Test | ASME B16.9 / B16.11 | No leakage @ 1.5× rated PSI |
| Dimensional Check | ASME B16.9 Table 2 | ±1.5mm on OD & center-to-face |
| Chemical Composition | ASTM A53 Grade B | C ≤0.30%, Mn ≤1.20%, P ≤0.05% |
Hot-dip galvanizing line — 70μm coating consistency
CNC machining center for precision end bevels
Export-bound palletized 2" & 3" elbow lots
WhatsApp price negotiation — 3" elbow order
Delivery schedule confirmation for 2" elbows
Post-shipment quality feedback
Our standard MOQ is 100 pieces for stock sizes. For project-based requirements of 500+ pieces, we offer tiered pricing with volume discounts up to 15%. Sample orders (2-5 pieces) are available for pre-production validation.
Yes. We support OEM/ODM customization including Sch 10/40/80 wall thickness, A106 Gr.B or stainless steel 304/316 material substitution, and customized end finishes (bevel, threading, or grooving per AWWA C606).
We regularly consolidate FCL (full container load) shipments via Tianjin Xingang Port — about 280 km from our Cangzhou plant. A 20ft container holds approximately 4,800 pieces of 2" elbows or 3,200 pieces of 3" elbows. Sea freight to Los Angeles averages 16-20 days; Rotterdam 25-30 days.
For first-time transactions: T/T with 30% deposit + 70% balance against B/L copy, or irrevocable L/C at sight. For repeat customers with established records: O/A 30-60 days or D/P at sight. We also accept payments via PayPal for sample orders.
Yes. Our products carry CE (97/23/EC Pressure Equipment Directive), ISO 9001:2015, and are manufactured in accordance with ASME B16.9 (factory-made wrought butt-welding fittings) and ASTM A53/A106 material standards. We provide full inspection documentation upon request.
We offer a 12-month workmanship warranty. If a product fails due to manufacturing defects, we cover the replacement cost and provide credit for the next order. In the unlikely event of dimensional non-conformance (verified by third-party inspection), we refund the non-conforming portion plus 8% compensation.
Custom branding (laser marking or high-temperature paint stencil) adds 2-3 days to production. For an order of 1,000 units with custom logo and packaging, expect total lead time of 14-18 days from P.O. confirmation to container loading.
Get a tailored quote with your exact specifications, volume pricing, and delivery timeline. Our engineering sales team responds within 4 business hours (Mon-Sat, GMT+8).
⚡ Limited-time: Free sample assessment for orders above 500 units · Use code WEIHUAN2026
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Senior Piping Systems Engineer · 14 years in carbon steel & galvanized fitting manufacturing · Member of ASME B31 Piping Design discussion group
Zhang Wei leads Weihuan's technical sales engineering team, providing OEM/ODM solutions for HVAC, wastewater, and oil & gas clients across 20+ countries. He has personally overseen more than 400 container shipments of pipe fittings to North American and European projects, and regularly contributes to engineering forums on piping stress analysis and galvanized coating performance.
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