ANSI Class 150 Flange Dimensions Complete Reference
ANSI Class 150 flanges are the most widely used flange type in industrial piping. This guide provides complete dimensional data, PDF references, and selection information for engineers and procurement professionals.
Class 150 Flange Overview
ANSI/ASME B16.5 Class 150 flanges are designed for low to medium pressure applications:
Pressure Rating
- Maximum working pressure: 285 psi at ambient temperature
- Hydrostatic test pressure: 450 psi
- Temperature range: -20°F to 800°F (-29°C to 427°C)
- Pressure decreases at elevated temperatures
المواد الشائعة
- Carbon Steel: ASTM A105, A350 LF2
- Stainless Steel: A182 F304/304L, F316/316L
- Alloy Steel: A182 F11, F22, F91
- Duplex: A182 F51, F53
Complete Dimension Tables
NPS 1/2 to NPS 24 Class 150 Dimensions
| NPS | دن | OD | قبل الميلاد | البراغي | Hole | Thick |
|---|---|---|---|---|---|---|
| 1/2 | 15 | 3.50 | 2.38 | 4 | 0.62 | 0.44 |
| 3/4 | 20 | 3.88 | 2.75 | 4 | 0.62 | 0.50 |
| 1 | 25 | 4.25 | 3.12 | 4 | 0.62 | 0.56 |
| 1.1/4 | 32 | 4.62 | 3.50 | 4 | 0.62 | 0.56 |
| 1.1/2 | 40 | 5.00 | 3.88 | 4 | 0.62 | 0.62 |
| 2 | 50 | 6.00 | 4.75 | 4 | 0.75 | 0.62 |
| 2.1/2 | 65 | 7.00 | 5.50 | 4 | 0.75 | 0.69 |
| 3 | 80 | 7.50 | 6.00 | 4 | 0.75 | 0.75 |
| 4 | 100 | 9.00 | 7.50 | 8 | 0.75 | 0.81 |
| 5 | 125 | 10.00 | 8.50 | 8 | 0.75 | 0.88 |
| 6 | 150 | 11.00 | 9.50 | 8 | 0.88 | 0.94 |
| 8 | 200 | 13.50 | 11.75 | 8 | 0.88 | 1.06 |
| 10 | 250 | 16.00 | 14.25 | 12 | 0.88 | 1.12 |
| 12 | 300 | 19.00 | 17.00 | 12 | 1.00 | 1.12 |
| 14 | 350 | 21.00 | 18.75 | 12 | 1.12 | 1.19 |
| 16 | 400 | 23.50 | 21.25 | 16 | 1.12 | 1.31 |
| 18 | 450 | 25.00 | 22.75 | 16 | 1.25 | 1.44 |
| 20 | 500 | 27.50 | 25.00 | 20 | 1.25 | 1.56 |
| 24 | 600 | 32.00 | 29.50 | 20 | 1.38 | 1.69 |
Note: All dimensions in inches. OD=Outside Diameter, BC=Bolt Circle, Hole=Bolt Hole Diameter, Thick=Flange Thickness
Threaded Flange for Small Bore Pipe
Threaded flanges are ideal for small diameter piping where welding is impractical:
نطاق الحجم
- Available: NPS 1/2 to NPS 4 (DN15 to DN100)
- Pressure classes: 150, 300, 600, 900, 1500, 2500
- Thread types: NPT, BSP, PT
التطبيقات
- توصيلات الأدوات
- Sample points
- Drain and vent lines
- التركيبات المؤقتة
- Hazardous areas (no hot work)
- Compressed air systems
- Water distribution
Installation Tips
- تنظيف الخيوط على كل من الشفة والأنبوب
- Apply PTFE tape or thread compound
- Hand-tighten first, then wrench
- Leave 1-2 threads exposed
- Do not overtighten
Flange Repair and Machining Service
Professional repair services extend flange life and reduce replacement costs:
Repair Capabilities
- Face Resurfacing: Repair damaged sealing surfaces
- Bore Machining: Restore proper pipe fit
- Bolt Hole Repair: Fix stripped or damaged holes
- Weld Overlay: Build up worn surfaces
- Re-drilling: Modify bolt patterns
When to Repair vs Replace
- Minor surface damage: Repair
- Severe corrosion: Replace
- Cracked flange: Replace
- Dimensional out of tolerance: Repair or replace
Carbon Steel Flange Suppliers
Finding reliable suppliers ensures quality and competitive pricing:
Supplier Selection Criteria
- Manufacturing capabilities and certifications
- Material traceability (MTR available)
- Quality control procedures
- Production capacity and lead times
- Export experience and references
- After-sales support
Price Indicators
- Raw material costs (steel prices)
- Manufacturing complexity
- Surface treatment requirements
- Quantity and size
- Certification requirements
مصنعي شفة الفولاذ المقاوم للصدأ حسب البلد
Major Manufacturing Regions
- China: Largest producer, competitive pricing
- India: Growing capacity, good quality
- Italy: Premium quality, higher cost
- USA: Domestic supply, quick delivery
- Japan: High precision, excellent quality
شفة مقاومة للتآكل للاستخدام البحري
Marine environments require superior corrosion resistance:
المواد الموصى بها
- 316/316L: General marine applications
- 2205 Duplex: Offshore platforms
- 2507 دوبلكس فائق الدوبلكس: الظروف القاسية
- 904L: Chemical tankers
- Aluminum Bronze: Propeller shafts
التدابير الوقائية
- Cathodic protection systems
- Protective coatings
- Regular inspection and maintenance
- Sacrificial anodes
Download Resources
- ASME B16.5 dimension charts (PDF)
- Material selection guides
- Installation procedures
- Inspection checklists
Songhai Flange supplies ANSI Class 150 flanges in all sizes with complete dimensional certification. Threaded flanges available for small bore applications. Contact us for repair services and marine-grade corrosion resistant options.
واتساب: +86-18658777855
البريد الإلكتروني: 1007788887@qq.com
قد يعجبك أيضاً
DIN Flanges vs ANSI Flange: ANSI Class 150, PN Rating and Selection Guide
A practical guide comparing DIN flanges and ANSI flange standards, including ANSI Class 150, PN meaning, flange rating ANSI systems, bolt patterns, dimensions and selection tips.
Flange Coupling Guide: Coupling Flange Type, Flanged Coupler and Shaft Applications
A practical guide to flange coupling, coupling flange type selection, flanged coupler structure, flange shaft coupling applications, installation and maintenance.
What Is an Orifice Flange? Orifice in Piping, Orifice Pipe and Flow Measurement Guide
A practical guide explaining what an orifice flange is, how an orifice in piping works, orifice pipe flow measurement, pressure taps, orifice plates and selection tips.