説明
Nickel-iron-chromium alloy industrial valve
合金 20 フローティングボールバルブ
A chemical-process valve material associated with sulfuric-acid, pickling and fertilizer duties. The floating ball valve configuration is engineered for fast on-off isolation in process and utility piping.
What is a Alloy 20 フローティングボールバルブ?
A Alloy 20 Floating Ball Valve combines a nickel-iron-chromium alloy containing copper and molybdenum, developed for resistance in sulfuric-acid and related chemical environments with a compact quarter-turn isolation design in which line pressure loads the floating ball against the downstream seat.
合金 20 selection must use concentration-temperature corrosion data and account for contaminants, エアレーション, velocity and crevices. Floating-ball suitability depends on size, differential pressure, seat load, operating torque and cavity-pressure behavior.
合金 20 Floating Ball Valve specifications
| 製品 | 合金 20 フローティングボールバルブ |
|---|---|
| Valve construction | One-, two- or three-piece floating-ball construction; full or reduced bore |
| Nominal material | 合金 20 |
| 私たち / EN reference | UNS N08020; EN 2.4660 |
| Product forms | Wrought/forged ASTM B462 または ASTM A182 F20 as applicable; cast ASTM A351 CN7M; component specification controlled by design |
| Design standards | API 608, ISO 17292 そして ASME B16.34; API 6D only when specifically designed and ordered |
| Pressure testing | API 598 or project-specified shell and closure testing |
| 圧力定格 | ASME Class or PN rating verified against exact material, サイズ, construction and design temperature |
| End connections | RF/RTJ flanged, ねじ切りされた, socket-weld or butt-weld according to design |
| Operation | Lever, gearbox, pneumatic or electric actuator |
| ドキュメント | EN 10204 3.1 material records, pressure test report, GA drawing and project inspection records as ordered |
This is an engineered inquiry product, not a universal stock specification. Final availability depends on valve size, 圧力クラス, material form, trim, seat system, operator, quantity and required code edition.
合金 20 material selection
| 選定のポイント | Engineering guidance |
|---|---|
| Material profile | a nickel-iron-chromium alloy containing copper and molybdenum, developed for resistance in sulfuric-acid and related chemical environments |
| Why it is selected | Useful resistance to sulfuric acid and a range of chemical environments, with fabrication characteristics familiar to stainless-alloy shops. |
| 代表的なサービス | Sulfuric-acid processing, fertilizer, pickling, chemical transfer and pharmaceutical process systems. |
| Limitations to check | It is not a universal acid alloy. Hydrochloric acid, oxidizing contaminants and mixed acids can change performance significantly. |
| Specification route | Wrought/forged ASTM B462 または ASTM A182 F20 as applicable; cast ASTM A351 CN7M; component specification controlled by design |
| Verification | PMI for nickel, クロム, copper and molybdenum plus heat traceability and component-specific MTC review. |
Floating Ball Valve design and standards
API 608 / ISO 17292
Common design bases for industrial metal ball valves; exact scope and edition must be stated.
ASME B16.34
圧力-温度, 材料, デザイン, examination, testing and marking requirements within scope.
API 598
Common shell and closure pressure-testing basis when specified.
API 607 / API 6FA
Fire-test qualification applies only to the exact offered seat, seal and valve configuration.
Seat polymer or metal, ball/stem alloy, packing, anti-static device, blowout-resistant stem, cavity relief and actuator torque must be selected together.
Fire-safe, fugitive-emission, sour-service, oxygen, cryogenic, chlorine and PED requirements apply only when explicitly defined and supported for the exact offered configuration.
代表的な用途
| 業界 | Material service context | Valve selection focus |
|---|---|---|
| Sulfuric-acid processing | Transfer, dilution and process systems within verified concentration-temperature limits | Seat compatibility, differential pressure, cavity relief, torque and fire-safe/emissions requirements |
| Fertilizer | Acid and chemical handling systems after compatibility review | Seat compatibility, differential pressure, cavity relief, torque and fire-safe/emissions requirements |
| Pickling | Selected acid circulation and transfer duties | Seat compatibility, differential pressure, cavity relief, torque and fire-safe/emissions requirements |
| Pharmaceutical and fine chemical | Corrosive reagent and batch-process systems | Seat compatibility, differential pressure, cavity relief, torque and fire-safe/emissions requirements |
Application examples are not a corrosion or design approval. The end user must verify process chemistry, 汚染物質, プレッシャー, 温度, 速度, サイクリング, emissions and regulatory requirements.
品質, testing and traceability
Heat-number traceability and EN 10204 3.1 records matched to the ordered component specifications.
PMI for nickel, クロム, copper and molybdenum plus heat traceability and component-specific MTC review.
API 598 or project-specified shell and closure testing, with acceptance and leakage criteria stated on the order.
GA drawing, 寸法, マーキング, operation, pressure test and specified NDE/third-party records.
見積依頼チェックリスト
- Valve design standard and required edition
- Nominal size and ASME Class or PN rating
- Exact material specifications for pressure boundary, trim, seats, packing and bolting
- Full or reduced bore, seat material, cavity relief, anti-static/fire-safe and actuator requirements
- End connection, facing and face-to-face requirement
- Fluid composition, 集中, contaminants and solids
- Design and operating pressure/temperature
- PMI, corrosion testing, 臨死体験, witnessing and document requirements
よくある質問
Why is Alloy 20 used in sulfuric-acid service?
そのニッケル, クロム, molybdenum and copper balance can provide useful resistance across selected sulfuric-acid conditions. Exact concentration, temperature and contaminants remain decisive.
What cast grade is commonly associated with Alloy 20 バルブ?
ASTM A351 CN7M is a commonly specified cast grade associated with Alloy 20-type service. Forged components use their applicable wrought specification.
缶合金 20 replace Hastelloy C276?
Not as a blanket substitution. The alloys have different chemistry, strength and corrosion behavior. Selection must follow actual process corrosion data and the piping material specification.
How does a floating ball valve achieve shutoff?
Line pressure moves the ball slightly toward the downstream seat, producing pressure-assisted sealing. Seat material and geometry control leakage and operating torque.
When should a trunnion-mounted design be considered?
Trunnion mounting is commonly evaluated as size, プレッシャー, torque, seat-load control or pipeline-service requirements increase.
缶合金 20 be used for every component in this floating ball valve?
自動的ではありません. Pressure-boundary, trim, stem or shaft, seating, packing, gasket and bolting materials have different mechanical and corrosion duties. The complete bill of materials must be engineered for the service.
Related Alloy 20 valve products
Need a broader comparison? View the general stainless steel and alloy ball valves guide or browse all ボールバルブ.
Request a Alloy 20 Floating Ball Valve quotation
Send the valve specification, exact material grades, サイズ, 圧力クラス, operating conditions, 技術審査のための数量と検査要件.
