説明
製品詳細
A long WN flange, also called a long weld neck flange, is a special type of weld neck flange with an extended tapered hub that can act as an integral reinforcement section or nozzle connection. It is widely used in pressure vessels, 列, reactors, process piping and high-integrity lines where improved stress distribution, fatigue resistance and reliable butt-weld connection are required. Typical industries include oil and gas, 化学処理, 発電, marine and water treatment.
SASA FLANGE supplies long WN flanges in standard and custom dimensions based on ASME B16.5, ASME B16.47, EN 1092-1, DIN, JIS, GB and customer drawings. Each flange can be provided with chemical analysis, 機械的試験, 寸法検査, PMIテスト, sealing face verification, EN 10204 3.1 certificate and full heat number traceability to support critical industrial projects.
- ✓製品名: Long WN Flange
- ✓材質グレード: 炭素鋼, ステンレス鋼, 合金鋼, duplex stainless steel and low-temperature steel grades
- ✓製品タイプ: Weld Neck Flange with extended hub / long tapered neck
- ✓主な特長: Excellent stress distribution, strong butt-weld connection, suitable for severe pressure and temperature service
- ✓アプリケーション: 圧力容器, refinery piping, オフショアモジュール, 発電所, chemical units, process equipment nozzles
製品パラメータ
| 製品名 | Long WN Flange |
| 材質グレード | ASTM A105, A350 LF2, A694 F52/F60/F65, ASTM A182 F304/F304L, F316/F316L, F321, F11, F22, F5, F9, F51, F53 |
| 材質の種類 | 炭素鋼, ステンレス鋼, 合金鋼, 二相ステンレス鋼, Low Temperature Steel |
| 製品形態 | Forged long weld neck flange, machined flange, custom nozzle flange |
| サイズ範囲 | DN15 – DN1500 (1/2 インチ – 60 インチ) |
| 圧力クラス | クラス 150 – 2500 / PN10 – PN100 |
| シール面 | RF, FF, RTJ, TG, MFM |
| 表面処理 | 防錆油, black paint, hot-dip galvanized, pickling, 不動態化, machined finish |
| 標準 | ASME B16.5, ASME B16.47, EN 1092-1, DIN, JIS B2220, ギガバイト/トン 9119 または顧客の仕様 |
| 検査 | 化学分析, 機械的試験, PMIテスト, 次元, 静水圧 |
| 証明書 | EN 10204 3.1 材料証明書が利用可能 |
| 加工サービス | 切断, CNC加工, カスタムドリリング, カスタムサイズ加工 |
化学組成
Chemical composition below is for reference based on a common carbon steel grade used for long WN flanges. Final chemistry depends on the specified material grade, heat treatment condition and applicable manufacturing standard. Actual values are confirmed by mill test certificate, incoming material verification and project inspection requirements.
| 要素 | C | そして | ん | P | S | Cr | で | モー | 他の |
|---|---|---|---|---|---|---|---|---|---|
| ASTM A105 コンテンツ % | 0.35 最大 | 0.10 – 0.35 | 0.60 – 1.05 | 0.035 最大 | 0.040 最大 | 0.30 最大 | 0.40 最大 | 0.12 最大 | 銅 0.40 最大, V 0.08 最大 |
機械的性質
Mechanical properties for long WN flanges vary according to material grade, forging reduction ratio, heat treatment condition and section thickness. The following values are typical minimum requirements for commonly specified grades. Project-specific requirements, impact testing and hardness limits can be provided according to purchase order and applicable standard.
| 学年 | 抗張力 | 降伏強さ | 伸長 | 硬度 | 密度 |
|---|---|---|---|---|---|
| ASTM A105 | 485 MPa以上 | 250 MPa以上 | 22% 分 | 137-187 HB | 7.85 g/cm3 |
| ASTM A182 F316L | 485 MPa以上 | 170 MPa以上 | 30% 分 | 95 HB max typical | 7.98 g/cm3 |
共通サイズ表
| サイズ範囲 | 圧力クラス | シール面 | 材料 | 可用性 |
|---|---|---|---|---|
| DN15 – DN50 | クラス 150 – 600 | RF | A105, F304L, F316L | ストック / 生産 |
| DN65 – DN300 | クラス 150 – 1500 | RF / RTJ | A105, LF2, F304, F316, F11 | ストック / 生産 |
| DN350 – DN600 | クラス 150 – 2500 | RF / RTJ | A105, F22, F316L, F51 | 生産 |
| DN700 – DN1500 | クラス 150 – 900 | RF | A105, A694 F60, F304L, F316L | オーダーメイド |
各種仕様比較
| タイプ | 説明 | 一般的な使用方法 |
|---|---|---|
| 標準ウェルドネックフランジ | Conventional tapered hub flange for butt welding to pipe | General process piping and pressure lines |
| Long WN Flange | Extended neck flange with longer hub for reinforcement and nozzle connection | 圧力容器, 列, towers and critical piping transitions |
| RTJ Long WN Flange | Long weld neck flange with ring type joint groove for high-pressure sealing | 製油所, offshore and high-pressure hydrocarbon service |
| Custom Nozzle Long WN Flange | Long WN flange machined to project drawing with special neck length and bore | Equipment nozzles, reactors and special engineered systems |
同等の規格と国際名
Long WN flanges are commonly produced to ASME dimensions or to custom equipment drawings, while equivalent drilling and flange systems can also be supplied to European, German, Japanese and Chinese standards. Material grade naming differs by region, so final selection should be confirmed by pressure rating, temperature range and corrosion service requirements.
| 標準 / 地域 | 標準コード | 代表的なグレード / 同等 |
|---|---|---|
| アメリカ合衆国 | ASME B16.5 | ASTM A105, A350 LF2, A182 F304/F316, F11/F22 |
| ヨーロッパ | EN 1092-1 | P245GH, C22.8, 1.4301, 1.4404, 13CrMo4-5 |
| ドイツ | DIN 2527 / 2566 | C22.8, 1.0460, 1.4571, 1.7380 |
| 日本 | JIS B2220 | SFVC2A, SUS304, SUS316, SF440A |
| 中国 | ギガバイト/トン 9119 | 20#, 16ん, 304, 316l, 12Cr1MoV |
生産工程の流れ
SASA FLANGE controls each manufacturing stage for long WN flanges to ensure correct grain flow, neck geometry, sealing face accuracy and traceable material compliance for critical industrial service.
- 1. 原材料の選択
- 2. 鍛造 / 切断
- 3. 熱処理
- 4. 荒加工
- 5. 仕上げ加工
- 6. 掘削
- 7. 表面処理
- 8. 検査
- 9. マーキング
- 10. パッキング
- 11. 配達
| プロセスステップ | 説明 | 品質管理ポイント |
|---|---|---|
| 原材料 | 認定された鍛造ビレットまたはプレートを選択してください | 材料証明書とトレーサビリティ |
| 鍛造 | 熱間鍛造により必要な形状を実現 | 鍛造温度と減速比 |
| 熱処理 | 正規化, tempering or annealing | 温度と保持時間の制御 |
| 機械加工 | シール面, ボルト穴, 寸法 | 寸法精度と表面仕上げ |
| 検査 | 出荷前の最終検査 | 寸法, 表面, PMI, 静水圧 |
製品検査
1. 化学成分検査
Chemical composition inspection is performed on raw material and, when required, on finished forgings to verify compliance with the specified grade such as A105, LF2 or A182 stainless and alloy steel. Testing confirms limits for carbon, manganese, phosphorus, sulfur and alloying elements, ensuring the long WN flange matches project specifications and material certificates.
2. 機械的特性試験
Mechanical properties testing includes tensile strength, 降伏強さ, elongation and hardness verification in accordance with the applicable ASTM or EN material standard. For low-temperature or critical service, impact testing can also be arranged. These tests confirm the long weld neck flange has sufficient strength, ductility and integrity for pressure-containing service.
3. 寸法検査
Dimensional inspection covers outside diameter, 厚さ, hub length, neck taper, ボアサイズ, bolt hole circle, hole quantity and hole alignment. The raised face or RTJ groove is also checked for accuracy and surface finish. This inspection is especially important for long WN flanges because extended neck dimensions often follow customer drawings or equipment nozzle requirements.
4. PMI試験と静水圧試験
PMI testing is available to confirm alloy content and prevent material mix-up, particularly for stainless steel, alloy steel and duplex long WN flanges. Hydrostatic pressure testing can be arranged when required for assembled components or project specifications. EN 10204 3.1 証明書, inspection reports and full heat number traceability are supplied to support documented quality control.
製品の梱包
- ✓木製ケース包装: 高圧・大口径製品に最適
- ✓シュリンクラップによるパレット梱包: バッチ出荷や標準サイズに適しています
- ✓防錆油塗装 + 耐水紙: 海上貨物の保護に使用されます
- ✓個別のビニール袋 + カートン: 小型継手やねじ製品に使用されます。
- ✓クリアマーキング: 学年, サイズ, 圧力クラス, ヒート番号とPO番号
アプリケーション
Long WN flanges are selected for demanding piping and equipment connections where additional neck length, smooth stress flow and strong butt-weld performance are required. They are widely used in process plants, pressure equipment and severe service systems where leakage resistance and structural reliability are critical.
| 業界 | 代表的な用途 | この製品が使用される理由 |
|---|---|---|
| 石油とガス | 製油所の配管, offshore skids, high-pressure process lines, pressure vessel nozzles | Provides strong butt-weld joint, better stress distribution and reliable sealing in severe service |
| 化学処理 | リアクター, 列, corrosive fluid transfer lines, equipment nozzles | Suitable for alloy and stainless grades with custom neck length for engineered connections |
| 発電 | Boiler feed lines, 蒸気システム, turbine auxiliaries, high-temperature headers | Handles elevated pressure and temperature with improved structural reinforcement |
| 水処理 | Large process piping, chemical dosing systems, pump and vessel connections | Offers durable flange-to-pipe transition and stable sealing performance |
| 海洋および海洋 | FPSO modules, seawater systems, deck process piping, 容器ノズル | Resists vibration and cyclic loading, with material options for corrosion-prone environments |
選ぶ理由 SASA FLANGE?
- ✓Professional manufacturer of Weld Neck Flange for global industrial projects
- ✓カスタマイズされたサイズ, 図面による圧力クラスと材料グレード
- ✓完全な標準サポート: ASME, EN, DIN, JIS, GB, GOSTと顧客の仕様
- ✓熱数制御による材料トレーサビリティと EN 10204 3.1 材料証明書
- ✓化学分析, 機械的試験, PMIテスト, 静圧検査および寸法検査
- ✓標準品の在庫状況, リードタイム 3-7 日; カスタム生産 15-30 日
- ✓海上向け輸出グレードの梱包, 航空輸送と陸上輸送
- ✓15+ 長年の供給経験 50+ 世界中の国
よくある質問
Q: What is a long WN flange?
あ: A long WN flange is a long weld neck flange with an extended tapered hub compared with a standard weld neck flange. It is designed to provide gradual stress transfer from pipe or vessel nozzle to the flange. It is widely used in pressure vessels, high-pressure piping and critical service applications where reinforcement and fatigue resistance are important.
Q: What materials are available for long WN flanges?
あ: SASA FLANGE supplies long WN flanges in carbon steel, 低温鋼, ステンレス鋼, alloy steel and duplex stainless steel. 一般的なグレードとしては、 ASTM A105, A350 LF2, A694 F52/F60, A182 F304/F304L, F316/F316L, F11, F22, F51 and F53. Material selection depends on pressure, 温度, corrosion environment and project specifications.
Q: サポートされている圧力クラス?
あ: Long WN flanges can be supplied in ASME Class 150, 300, 600, 900, 1500 そして 2500, as well as equivalent PN ratings such as PN10 to PN100 where applicable. The actual rating depends on flange design, 材質グレード, operating temperature and the governing standard or customer drawing for the equipment connection.
Q: できる SASA FLANGE カスタムサイズを供給する?
あ: はい. SASA FLANGE can manufacture custom long WN flanges according to drawings, including special neck length, ハブの寸法, ボアサイズ, 壁の移行, 対面タイプ, drilling pattern and non-standard materials. This is especially useful for vessel nozzles, process equipment and replacement components where standard dimensions do not fully match the installation requirements.
Q: どのような証明書が提供されるか?
あ: SASA FLANGE 提供します EN 10204 3.1 material certificate as standard for long WN flange orders. Supporting documents can include mill test certificate, chemical analysis, mechanical test reports, PMI records, dimensional inspection report and hydrostatic test report when required. Full heat number traceability is maintained from raw material to finished product for project quality assurance.
お問い合わせ
If you are looking for long wn flange or related custom flange products, 連絡してください SASA FLANGE 必要なサイズで, 圧力クラス, 材質グレード, 標準, 表面処理, 数量と検査要件. 私たちのチームは専門的な技術ソリューションと競争力のある見積もりを提供します。 24 時間.
- 📧メール: sales@sasaflange.com
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