Описание
ASTM A182 F20 Alloy Steel Globe Valve for High-Temperature and Refinery Applications
The A182 F20 Globe Valve, Class 150 LB, RF End is a high-performance alloy steel клапан designed for reliable flow regulation and shutoff in elevated-temperature and moderate-pressure applications. Manufactured from ASTM A182 F20 chromium-molybdenum alloy steel, this valve offers excellent creep strength, oxidation resistance, and thermal stability, making it particularly suitable for refineries, petrochemical plants, power stations, and high-temperature process systems.
Designed in accordance with БС 1873 г., АСМЭ Б16.34, ASME B16.5, и API 598, the valve provides excellent throttling performance, dependable sealing, and long service life under demanding operating conditions.
Product Overview
| Item | Спецификация |
|---|---|
| Product Type | Шаровой вентиль |
| Body Material | ASTM A182 F20 Alloy Steel |
| Pressure Rating | ASME Class 150 LB |
| Тип соединения | RF (Raised Face) Flanged End |
| Стандарт дизайна | БС 1873 г. |
| Face-to-Face | АСМЭ Б16.10 |
| Flange Standard | ASME B16.5 |
| Pressure-Temperature Rating | АСМЭ Б16.34 |
| Inspection & Testing | API 598 |
| Операция | Handwheel, Gear, Electric Actuator |
| Applicable Media | Steam, Thermal Oil, Oil, Gas, High-Temperature Fluids |
What is ASTM A182 F20?
ASTM A182 F20 is a chromium-molybdenum alloy steel containing approximately 2.25% chromium and 1% molybdenum. It provides superior high-temperature strength and oxidation resistance compared with conventional carbon steel.
Advantages of F20 Alloy Steel
- Excellent creep resistance
- High-temperature strength
- Good oxidation resistance
- Outstanding thermal fatigue resistance
- Suitable for elevated-temperature service
- Long service life in severe applications
Product Features
Excellent Flow Regulation
The globe valve design provides:
- Precise throttling capability
- Stable flow control
- Low seat leakage
- Reliable shutoff performance
Unlike gate valves, globe valves are ideal for applications requiring flow modulation.
Class 150 Pressure Rating
Suitable for:
- Medium-pressure steam systems
- Thermal oil systems
- Petrochemical process lines
- Refinery utility services
RF Flanged End Connection
The raised-face flange design offers:
- Reliable gasket sealing
- Easy installation and maintenance
- Excellent pressure containment
- Compatibility with ASME B16.5 flanges
High-Temperature Service Capability
F20 alloy steel performs exceptionally well in:
- Steam applications
- Heat transfer oil systems
- Hydrocarbon processing
- High-temperature utility lines
Технические характеристики
Materials of Construction
| Component | Материал |
|---|---|
| Тело | ASTM A182 F20 |
| Капот | ASTM A182 F20 |
| Диск | ASTM A182 F20 + Stellite Overlay |
| Seat Ring | 13Cr / Stellite Hardfaced |
| Корень | ASTM A182 F6a |
| Упаковка | Flexible Graphite |
| Прокладка | Spiral Wound SS + Graphite |
Applicable Standards
| Стандартный | Описание |
|---|---|
| БС 1873 г. | Steel Globe Valve Design |
| АСМЭ Б16.34 | Pressure-Temperature Ratings |
| АСМЭ Б16.10 | Face-to-Face Dimensions |
| ASME B16.5 | Flanged Ends |
| API 598 | Inspection & Testing |
| МСС СП-25 | Valve Marking |
Working Principle
The globe valve operates through linear movement of the disc.
Opening
- Rotating the handwheel raises the stem.
- The disc moves away from the seat.
- Flow is gradually increased.
- Flow rate can be accurately controlled.
Closing
- The stem moves downward.
- The disc contacts the seat.
- Tight shutoff is achieved.
- Leakage is minimized.
Typical Applications
Oil Refineries
Widely used in:
- Hydrocarbon process lines
- Utility systems
- Heat recovery units
- Thermal oil circuits
Refinery Installation
Power Generation Plants
Suitable for:
- Auxiliary steam systems
- Boiler piping
- Heat transfer circuits
- Condensate systems
Power Plant Application
Petrochemical Industry
Applied in:
- High-temperature process units
- Utility steam systems
- Chemical transfer lines
- Heat exchangers
Термальные масляные системы
Ideal for:
- Heat transfer oil circuits
- Industrial furnaces
- Process heating systems
Advantages of A182 F20 Globe Valves
| Feature | Benefit |
|---|---|
| Alloy Steel Construction | Excellent thermal stability |
| RF Flanged Ends | Easy installation |
| Globe Valve Design | Accurate flow control |
| Stellite Seating | Improved wear resistance |
| Graphite Packing | High-temperature sealing |
| Long Service Life | Reduced maintenance costs |
A182 F20 vs Carbon Steel Globe Valve
| Property | A182 F20 | ASTM A105 |
|---|---|---|
| High-Temperature Strength | Excellent | Moderate |
| Oxidation Resistance | Better | Стандартный |
| Creep Resistance | Excellent | Limited |
| Service Life at Elevated Temperatures | Longer | Shorter |
| Material Cost | Higher | Lower |
For elevated-temperature applications, F20 alloy steel offers significant performance advantages over carbon steel.
Inspection and Testing
Every valve undergoes rigorous quality control procedures including:
Hydrostatic Shell Test
Verifies body strength and pressure integrity.
Seat Leakage Test
Ensures reliable shutoff.
PMI Testing
Confirms alloy material composition.
Dimensional Inspection
Ensures compliance with ASME and BS standards.
Optional NDE Examinations
- Radiographic Testing (RT)
- Ultrasonic Testing (UT)
- Magnetic Particle Testing (MT)
- Dye Penetrant Testing (PT)
Available Options
Trim Materials
- 13Cr Trim
- Stellite Trim
- Stainless Steel Trim
Actuation Options
- Manual Handwheel
- Gear Operator
- Electric Actuator
- Pneumatic Actuator
Special Requirements
- NACE MR0175 Compliance
- Low Emission Packing
- Oxygen Service Cleaning
- EN 10204 3.1 Certification
Frequently Asked Questions
What is ASTM A182 F20?
ASTM A182 F20 is a chromium-molybdenum alloy steel designed for elevated-temperature service with excellent creep resistance and oxidation resistance.
Is Class 150 suitable for steam systems?
Yes. Class 150 valves are commonly used in medium-pressure steam and thermal oil applications.
Why choose a globe valve instead of a gate valve?
Globe valves provide superior flow control and throttling performance.
What is the benefit of RF flanges?
Raised-face flanges provide improved gasket compression and more reliable sealing.
Which industries use A182 F20 globe valves?
Power generation, oil refining, petrochemical processing, thermal oil systems, and chemical plants.
Request a Quote
China Alloy Steel Globe Valve Manufacturer
We provide:
✅ ASTM A182 F20 Alloy Steel Valve Solutions
✅ BS 1873 & ASME B16.34 Compliant Manufacturing
✅ High-Temperature Valve Expertise
✅ Third-Party Inspection Support
✅ OEM & Custom Design Services
✅ Global Export Experience
Please provide:
- Размер клапана
- Pressure Rating (150 LB)
- Рабочая Температура
- Media Type
- Quantity Required
- Special Requirements
Our engineering team will provide a detailed quotation, technical datasheet, GA drawing, and delivery schedule within 24 hours.
