Keywords: long sweep 90, sweep 90, 4 inch long sweep 90, 3 long sweep 90, 3 inch long sweep 90
Product: male and female 90° long sweep bend

The global pipe fittings industry, especially the long sweep 90 segment, is witnessing steady growth due to urban infrastructure expansion, elevated environmental standards, and increased investments in petrochemical, metallurgy, and water management sectors. The market demand for high-performance sweep 90 pipes and bends—particularly larger radii such as the 4 inch long sweep 90 and 3 inch long sweep 90—is driven by their advantages in flow efficiency, lower pressure loss, and improved corrosion resistance.

According to Grand View Research (2023), the global pipe fittings market is projected to reach USD 61.8 billion by 2030, growing at a CAGR of 5.4%. Among these, advanced bends like long sweep 90, especially male and female types, are preferred for their extended service cycles and ease of installation.

Full Manufacturing Workflow for long sweep 90:

→ Material Preparation: High-grade ductile iron or stainless steel as per ISO 2531 / ANSI AWWA C110 norms.
→ Casting/Hot Forming: Utilizes advanced sand-casting (for ductile iron) or hot induction bending (for steel) to create the primary sweep curve.
→ CNC Finishing: CNC machining for precise male and female end faces, ensuring high dimensional accuracy and perfect fit.
→ Surface Cleaning & Inspection: Shot blasting, followed by NDT (Non-Destructive Testing) for internal flaws.
→ Coating: Dual-layer FBE (Fusion Bonded Epoxy) or polyurethane for anti-corrosion; ensures 30% longer lifecycle (per ASTM B117 salt spray test).
→ Final QC: Pressure, leakage, and dimension tests according to ISO 9001 and ANSI standards, labelled for traceability.
→ Packing & Logistics: Custom packaging with anti-impact material for optimal delivery.

• Material: Ductile iron (EN-GJS-500-7), Stainless Steel (AISI 304/316), Carbon Steel (ASTM A234 WPB)
• Manufacturing: Precision sand casting / induction hot bending + CNC machining
• Testing: Hydrostatic test (1.5x rated pressure), Ultrasonic/NDT as per ISO/ANSI/SGS
• Coating: FBE (250um min.), Polyurethane or customized options
• Certifications: ISO 9001, ANSI/AWWA, SGS, WRAS (for potable water)
• Lifespan: Up to 40 years in normal operation (referenced by field applications in water supply projects)
• Applications: Petrochemicals, metallurgy, municipal water supply, fire-fighting, HVAC, irrigation

Long sweep 90 bends offer multiple technical and practical advantages over standard 90° elbows:

• Reduced Pressure Loss: CFD (Computational Fluid Dynamics) studies indicate up to 38% lower pressure drop for 4 inch long sweep 90 than standard elbows at 2.5 m/s flow rates.
• Lower Energy Consumption: Smoother inside radius and prolonged curve significantly decrease turbulence—improving overall pumping efficiency (up to 8% energy savings per US EPA study for municipal pumping stations).
• Enhanced Corrosion Resistance: FBE/polyurethane coatings in male and female 90° long sweep bends withstand >1200h salt spray per ASTM B117; ideal for aggressive and saline environments.
• Superior Service Life: Extended service intervals—field data shows replacement cycles averaging 30% longer than traditional welded elbows.
• Ease of Alignment: Male & female (spigot & socket) ends ensure leak-proof assembly and minimize installation errors.
• Standards Compatibility: Compatible with ISO 2531, ANSI/AWWA C110/153, ensuring global applicability and interoperability.

• Urban potable water and wastewater pipelines (large-bore, high-pressure)
• Petrochemical plant main loops and cooling water circuits
• Power plant ash/slag transport and metallurgy fluids
• Fire protection systems requiring fast assembly and high reliability
• Industrial and agricultural irrigation main lines

Example: 2022, Hangzhou Municipal Water Utility—replacement of 120+ old 3 inch 90° welded elbows with long sweep 90 male and female bends led to a 22% drop in maintenance call-outs and annual OPEX reduction of ~$12,000.

• Size/Radius Customization: Non-standard radii (2.5D, 3D), custom wall thickness, and specialty coatings for extreme conditions.
• Material Upgrades: Food-grade or extra-resistant alloys (e.g., EN-GJS-400-18U-LT for low-temperature use).
• Third Party Testing/Traceability: All custom orders are supplied with complete test reports and traceable batch certificates (EN 10204 3.1).
• Delivery Period: For standard sizes: 18-22 working days (ex-works)
  For custom orders: 28-45 working days
• Packaging: Heavy-duty pallets, anti-corrosion wrapping, QR code tracking.
• Warranty: 10-year quality guarantee, with on-site support and free replacements for manufacturing defects.

• Certifications: ISO 9001, ISO 14001, ANSI/AWWA, SGS, WRAS, EN 10204 3.1
• Notable Clients: Sinopec, Powen Water, Siemens Water Solution, municipal utilities worldwide
• Service: 24/7 technical hotline, global logistics, bilingual support team, annual maintenance consulting
• After-sales: All long sweep 90 products covered by material and workmanship warranty for 10 years

Q1: What is the typical material used for long sweep 90 bends?

A: Common materials include ductile iron (EN-GJS-500-7), carbon steel (ASTM A234 WPB), and stainless steel (AISI 304/316), selected for their mechanical strength and corrosion resistance characteristics.

Q2: How do I select the correct bend radius for my project?

A: Choose based on required flow efficiency, space constraints, and pressure drop. Standard long sweep 90 radii are 1.5D and 2.5D, where D is the nominal diameter.

Q3: Which installation standards are applicable?

A: Follow ISO 2531 for ductile iron, ANSI/AWWA C110/C153 for North America, and adhere to local codes for flange/connection specs.

Q4: What’s the difference between male and female ends in these fittings?

A: Male (spigot) and female (socket) ends facilitate quick, leak-proof assembly and offer better flexibility for field adjustments and retrofits.

Q5: How is product quality ensured before shipping?

A: Each long sweep 90 bend is tested via hydrostatic pressure, non-destructive tests (NDT), and visual/dimension inspections per ISO/SGS protocols.

Q6: Can these bends be used for hazardous or abrasive fluids?

A: Yes, with proper material/coating selection—e.g., polyurethane or FBE, and special alloys for aggressive chemicals (consult factory for custom designs).

Q7: What is the recommended maintenance protocol?

A: Annual inspection of the coating, joint tightness, and periodic pressure re-testing as advised by ANSI/AWWA M41 manual.

• Lead Time: How fast can I get my long sweep 90 order?
  A: Standard sizes ship within 18-22 working days; custom specs may take 4-7 weeks.
• Warranty: What if there is a manufacturing defect?
  A: All bends come with a 10-year warranty covering material and workmanship defects; replacements are free of charge.
• Support: How do I get technical help during installation?
  A: 24/7 hotline, video guides, and remote engineering support are provided for all customers globally.
• Certificates & Documents: Are materials fully traceable?
  A: Yes, full documentation (EN 10204 3.1 certificates, test reports) supplied with all orders.

Choosing the right long sweep 90 fitting—especially male and female 90° long sweep bend—boosts flow efficiency, long-term reliability, and eases your maintenance budget. With a globally certified supplier, robust warranty promise, and proven custom engineering, you can dramatically improve the resilience of your piping infrastructure.