Keterangan
Nickel-iron-chromium alloy industrial valve
Paduan 20 Katup Gerbang Baji
A chemical-process valve material associated with sulfuric-acid, pickling and fertilizer duties. The wedge gate valve configuration is engineered for fully open or fully closed isolation with low open-position pressure loss.
Apa itu Paduan 20 Katup Gerbang Baji?
Sebuah Paduan 20 Wedge Gate Valve combines a nickel-iron-chromium alloy containing copper and molybdenum, developed for resistance in sulfuric-acid and related chemical environments with a full-opening linear isolation design that raises a wedge out of a substantially straight flow path.
Paduan 20 selection must use concentration-temperature corrosion data and account for contaminants, aerasi, velocity and crevices. A wedge gate valve is not normally used for throttling because partial opening can produce vibration and seat or guide damage.
Paduan 20 Wedge Gate Valve specifications
| Produk | Paduan 20 Katup Gerbang Baji |
|---|---|
| Konstruksi katup | Bolted-bonnet outside-screw-and-yoke rising-stem gate valve with flexible or solid wedge |
| materi nominal | Paduan 20 |
| KITA / Sebuah referensi | UNS N08020; EN 2.4660 |
| Bentuk produk | Ditempa/ditempa ASTM B462 atau ASTM A182 F20 as applicable; pemeran ASTM A351 CN7M; component specification controlled by design |
| Standar desain | API 600 Dan ASME B16.34; API 602 untuk desain tempa kompak yang dapat diterapkan |
| Pengujian tekanan | API 598 atau shell yang ditentukan proyek, pengujian kursi belakang dan penutupan |
| Peringkat tekanan | Peringkat Kelas ASME atau PN diverifikasi berdasarkan materi yang tepat, ukuran, suhu konstruksi dan desain |
| Akhiri koneksi | Ujung berflensa atau las butt RF/RTJ sesuai desain |
| Operasi | roda tangan, kotak roda gigi, electric, pneumatic or hydraulic actuator |
| Dokumentasi | EN 10204 3.1 catatan materi, laporan uji tekanan, Gambar GA dan catatan inspeksi proyek sesuai pesanan |
Ini adalah produk penyelidikan yang direkayasa, bukan spesifikasi stok universal. Ketersediaan akhir tergantung pada ukuran katup, kelas tekanan, bentuk materi, memangkas, sistem kursi, operator, kuantitas dan edisi kode yang diperlukan.
Paduan 20 pemilihan bahan
| Titik seleksi | Bimbingan teknik |
|---|---|
| Profil bahan | a nickel-iron-chromium alloy containing copper and molybdenum, developed for resistance in sulfuric-acid and related chemical environments |
| Mengapa dipilih | Useful resistance to sulfuric acid and a range of chemical environments, with fabrication characteristics familiar to stainless-alloy shops. |
| Layanan khas | Sulfuric-acid processing, pupuk, pengawetan, chemical transfer and pharmaceutical process systems. |
| Keterbatasan untuk diperiksa | It is not a universal acid alloy. Hydrochloric acid, oxidizing contaminants and mixed acids can change performance significantly. |
| Spesifikasi rute | Ditempa/ditempa ASTM B462 atau ASTM A182 F20 as applicable; pemeran ASTM A351 CN7M; component specification controlled by design |
| Verifikasi | PMI untuk nikel, kromium, copper and molybdenum plus heat traceability and component-specific MTC review. |
Wedge Gate Valve design and standards
API 600
Common design basis for bolted-bonnet steel gate valves, including material, memangkas, testing and marking requirements.
ASME B16.34
General pressure-temperature and valve design requirements within scope.
API 598
Kerang, pengujian tekanan kursi belakang dan penutupan bila ditentukan.
API 624 / ISO 15848-1
Fugitive-emission qualification is specific to the packing system and qualified valve design.
Wedge flexibility, seat hardfacing, stem/packing system, body cavity drainage, thermal binding risk and operating thrust require service-specific review.
Aman dari kebakaran, emisi buronan, layanan asam, oksigen, kriogenik, Persyaratan klorin dan PED hanya berlaku jika ditentukan secara eksplisit dan didukung untuk konfigurasi yang ditawarkan secara tepat.
Aplikasi yang umum
| Industri | Konteks layanan material | Fokus pemilihan katup |
|---|---|---|
| Sulfuric-acid processing | Transfer, dilution and process systems within verified concentration-temperature limits | Full-open isolation, wedge/seat materials, thermal effects, packing emissions and operator thrust |
| Pupuk | Acid and chemical handling systems after compatibility review | Full-open isolation, wedge/seat materials, thermal effects, packing emissions and operator thrust |
| Pickling | Selected acid circulation and transfer duties | Full-open isolation, wedge/seat materials, thermal effects, packing emissions and operator thrust |
| Pharmaceutical and fine chemical | Corrosive reagent and batch-process systems | Full-open isolation, wedge/seat materials, thermal effects, packing emissions and operator thrust |
Contoh aplikasi bukan merupakan persetujuan korosi atau desain. Pengguna akhir harus memverifikasi proses kimia, kontaminan, tekanan, suhu, kecepatan, bersepeda, emisi dan persyaratan peraturan.
Kualitas, pengujian dan ketertelusuran
Keterlacakan nomor panas dan EN 10204 3.1 catatan yang cocok dengan spesifikasi komponen yang dipesan.
PMI untuk nikel, kromium, copper and molybdenum plus heat traceability and component-specific MTC review.
API 598 atau shell yang ditentukan proyek, pengujian kursi belakang dan penutupan, dengan kriteria penerimaan dan kebocoran yang tertera pada pesanan.
menggambar GA, ukuran, menandai, operasi, uji tekanan dan catatan NDE/pihak ketiga yang ditentukan.
Daftar periksa RFQ
- Standar desain katup dan edisi wajib
- Ukuran nominal dan peringkat ASME Class atau PN
- Spesifikasi material yang tepat untuk batas tekanan, memangkas, kursi, pengepakan dan perbautan
- Flexible or solid wedge, tempat duduk/menghadap keras, stem arrangement, packing and operator requirements
- Akhiri koneksi, kebutuhan yang dihadapi dan tatap muka
- Komposisi cairan, konsentrasi, kontaminan dan padatan
- Desain dan tekanan/suhu pengoperasian
- PMI, pengujian korosi, mati suri, persyaratan saksi dan dokumen
Pertanyaan yang sering diajukan
Why is Alloy 20 used in sulfuric-acid service?
Nikelnya, kromium, 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 katup?
ASTM A351 CN7M is a commonly specified cast grade associated with Alloy 20-type service. Forged components use their applicable wrought specification.
Bisa Paduan 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.
Can a wedge gate valve be used for throttling?
Normally no. It is intended for fully open or fully closed service; extended partial opening can damage the wedge, seats and guides.
What is the difference between flexible and solid wedges?
A flexible wedge can accommodate limited alignment and thermal effects, while a solid wedge is more rigid. Selection follows the design and service conditions.
Bisa Paduan 20 be used for every component in this wedge gate valve?
Tidak secara otomatis. Batas tekanan, memangkas, batang atau poros, tempat duduk, sedang mengemas, bahan paking dan baut memiliki tugas mekanis dan korosi yang berbeda. Bill of material yang lengkap harus direkayasa untuk layanan tersebut.
Related Alloy 20 produk katup
Perlu perbandingan yang lebih luas? Lihat general stainless steel and alloy gate valves guide atau telusuri semuanya Katup Gerbang.
Request a Alloy 20 Wedge Gate Valve quotation
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