Deskripsi
Reducer Eksentrik. Reducer eksentrik adalah reducer yang pusat lingkarannya tidak berada pada garis lurus yang sama, fungsinya untuk meletakkan pipa menempel pada dinding atau lantai tanpa memakan ruang, dan juga menghubungkan dua pipa dengan diameter berbeda, mengubah laju aliran. Penggunaan produk: pipa minyak bumi, pipa gas alam, pabrik kimia, pembangkit listrik, galangan kapal, farmasi, produk susu, bir, minuman, irigasi, dll.
Aplikasi
Minyak bumi, kimia, pembangkit listrik, galangan kapal, farmasi, bejana tekan, pipa pemanas kota dan pasokan air.
Spesifikasi teknis
Standar: ASME B16.x / EN 102xx / GB/T 12459 / GB/T 14383; Bahan: ASTM A234 WPB/WP11/WP22; A403 WP304/WP316; A420 WPL6; karbon, paduan, stainless; Ukuran: 1/2" - 48" (DN15 - DN1200); Ketebalan / Tekanan: Sch 5S - Sch XXS / PN 6 - PN 420; Permukaan: shot blasting, minyak, cat, atau galvanis.
Standar referensi
- Judul standar
- Standard Specification for Piping Fittings of Wrought Carbon Steel and Alloy Steel for Moderate and High Temperature Service
- Lembaga penerbit
- ASTM International
Material serupa / alternatif
Produk ini mencakup beberapa grade dasar. Alternatif di bawah dikelompokkan per famili — setiap kartu adalah jalur upgrade DARI grade dasar yang berlabel. Pemilihan akhir ditinjau insinyur material.
Switch to A420 WPL6 when service temp ≤ -29°C (Charpy at -46°C); WPB is not qualified for low temperature.
For creep range (~450-540°C) move to 1.25Cr-0.5Mo (WP11) or 1Cr-0.5Mo (WP12).
For high-temp creep / hydrogen service use 2.25Cr-1Mo (WP22), common in hydrotreaters and boiler reheat.
Ultra-supercritical main steam / 540-620°C zones use 9Cr-1Mo-V (Grade 91).
Selection window: MDMT between -101°C and -46°C (colder than WPL6, warmer than 9% Ni). Charpy at -150°F (-101°C); typical for ethylene and deep cryogenic propane lines.
LNG (-162°C) / liquid nitrogen (-196°C) butt-weld fittings use ASTM A420 WPL8 (Ni 8.4–9.6%, commonly called 9% Ni; Charpy at -320°F / -196°C); matching pipe A333 Gr.8, forgings A522.
Chloride service (Cl⁻ > 50 ppm, especially T > 60°C): use 316L; higher chloride or temperature still risks SCC — upgrade to duplex.
Seawater / high chloride / moderate temperature butt-weld fittings: duplex 2205 (A815 WP-S31803), PREN ≈ 35, better pitting resistance than 316L. A182 F51 covers forgings/flanges.
Offshore / FPSO / water injection wellhead: super duplex 2507 (A815 WP-S32750), PREN ≈ 42–43 (industry SDSS threshold ≥ 40). A182 F53 covers forgings/flanges.
Strong acid / high-temp sour / hydrogen service: upgrade to Inconel 625 (UNS N06625, WPNCMC) or Incoloy 825 (UNS N08825, WPNICMC).
Hydrochloric acid / wet chlorine / strongly reducing media: Hastelloy C-276 (UNS N10276, WPHC276).
Aplikasi industri tipikal
Cara umum tim pengadaan menggunakan material/kategori ini. Cocokkan dengan spec proyek sebelum BOM final.
- Oil & Gas PipelinesOnshore crude / gas trunk lines: API 5L X42 and below pair with A234 WPB; X52-X70 must pair with MSS SP-75 WPHY-52/60/65/70 (yield-strength match). Service window -29 to +120°C (B31.4 / B31.8 onshore practice).
- Water & Fire ProtectionMunicipal water, cooling-water loops, fire mains; carbon steel with galvanizing or epoxy lining.
- LNG / CryogenicPropane / LPG (~-46°C) → A420 WPL6; ethylene (~-101°C) → A420 WPL3; LNG (-162°C) / liquid nitrogen (-196°C) butt-weld fittings step up to A420 WPL8 (Ni 8.4–9.6%, commonly called 9% Ni).
- Power GenerationSub / supercritical main steam and reheat lines: WP11 (~540°C) / WP22 (~565°C) / WP91 (~620°C).
- Refinery / HydroprocessingHydrocracking / hydrotreating reactor in/out lines; hydrogen-service per Nelson curve uses WP5 / WP9 / WP22.
- OffshoreSeawater loops / FPSO process lines prefer duplex A815 WP-S31803 (2205) / super duplex A815 WP-S32750 (2507); 316L only for short-term or low-chloride sections (SCC risk above ~60°C even with 316L).
Standar dan material
Informasi berikut digunakan untuk pemilihan produk dan komunikasi RFQ. Persyaratan akhir mengikuti gambar, standar, dan dokumen pembelian.
