Buttweld fittings are critical components used to join piping segments permanently.They form the backbone of high-integrity fluid systems.This connection method provides maximum structural strength.Reliable Фитинги для труб из нержавеющей стали are essential for any system using Трубы из нержавеющей стали.
What Are Buttweld Fittings
Stainless Steel buttweld fittings are specifically designed for direct welding to pipelines.Both ends of the fittings feature beveled surfaces,which facilitate precise alignment and enable full penetration welding.The joints formed by these fittings are virtually seamless,creating a continuous,integral pipeline structure.
Why Use Stainless Steel Buttweld Fittings
- High Pressure Capability:
The full penetration weld maximizes strength.It handles extreme internal pressures easily.Threaded fittings cannot withstand comparable forces. - Устойчивость к коррозии:
Using stainless steel guarantees durability.The material resists corrosive fluids and chemicals.This ensures the longevity of the entire line. - Leak Prevention:
The welded joint eliminates crevices and gaps.This minimizes the risk of fluid leakage.A welded line provides superior security. - Structural Integrity:
The joint is stronger than the pipe itself. This makes the pipeline more resilient. It handles thermal and mechanical stress effectively.
Types and Functions of Buttweld Fittings
Локти
Отводы из нержавеющей стали are used to alter the direction of piping.They are categorized into short-radius elbows (SR) and long-radius elbows (LR).Long-radius elbows provide smoother fluid flow,thereby reducing pressure loss and turbulence within stainless steel piping systems.
Tees and Crosses
Stainless steel tees are used to branch the main pipeline into branch lines.Both equal-diameter and reducer tees are available.
Stainless steel cross fittings provide four connection points,suitable for situations requiring simultaneous fluid diversion in two directions.
Редукторы
Stainless steel reducers smoothly transition between different pipe diameters.A concentric reducer is shaped like a cone.An eccentric reducer has one flat side. Eccentric reducers are used to prevent air pockets or accumulation of fluid.
Caps and Stub Ends
Stainless steel caps are used for permanently sealing pipelines.When paired with lap flanges at the pipe ends,they enable easy rotation of the фланец,thereby simplifying bolt alignment during assembly.
| Fitting Type | Основная функция | Joint Profile |
|---|---|---|
| Локоть | Изменить направление | Smooth flow |
| Тройник | Branch line | Flow division |
| Редуктор | Change diameter | Smooth transition |
| Шапка | Line termination | Permanent seal |
Buttweld Fittings Materials and Capacity
Materials We Use For Buttweld Fittings
| Alloy Group | Ключевая особенность | Основное использование |
|---|---|---|
| Нержавеющая сталь | Устойчивость к коррозии | General Piping, Fittings |
| Duplex & Super Duplex | High Strength, Chloride Resistance | Offshore, Petrochemical |
| Сплав на основе никеля | High Temperature, Extreme Corrosion | Chemical Reactors, Furnaces |
| Медно-никелевый сплав | Seawater Service | Marine, Desalination |
| Титановый сплав | Lightweight, Bio-compatibility | Aerospace, Medical, Harsh Acid |
| Carbon & Alloy Steel | Cost-Effective Strength | Standard Industrial, Power Generation |
| Материал | Common Grades (ASTM/UNS) |
|---|---|
| Нержавеющая сталь | ASTM A403 304/L, 304H 310S, 310H 316/L, 316Ti, 316H 317/L 321/H 347/H S31803 S32750 904L 254SMO (S31254) |
| Дуплекс и супердуплекс | ASTM A815 UNS S31803, S32205, UNS S32750, S32760 |
| Сплав на основе никеля | Alloy 200, Monel 400, K500, Inconel 600, 625, Incoloy 800, 800H, 800HT, 825, alloy 20, alloy28, hastelloy C22, C276 etc. |
| Медно-никелевый сплав | Cu70Ni30 (C71500, B30), Cu90Ni10 (C70600, B10) |
| Титановый сплав | Gr. 1, Gr.2, Gr.11 и т.д. |
| углеродистая сталь | ASTM A234 WPB, WPC |
| Низкотемпературная сталь | ASTM A420 WPL3, WPL6 |
| Легированная сталь | ASTM A234 WP5, WP9, WP11, WP12, WP22, WP91, WP911, WPR |
| Высокопрочная сталь | ASTM A860 WPHY42, 46, 50, 52, 56, 60, 65, 70 |
*Перечисленные материалы приведены только для справки, некоторые материалы будут по количеству, потому что у нас может не быть сырья на складе. Мы можем поставлять фитинги из нержавеющей стали 304, 316, дуплексные фитинги S31803 и т.д.
**DIN/EN эквивалентный класс доступен, но иногда мы будем использовать ASTM/ASME материал для замены, если количество не значительное или материал трудно получить. Мы отметим это в предложении.
Our Capacity For Buttweld Fittings
- Размер: от 1/2" до 104" для сварных и бесшовных изделий
- SCH5S, SCH10S, SCH40S, STD, SCH80S/XS, SCH100, SCH120, SCH160, SCHXXS
- Присоединительный конец: под сварку встык.
| Продукт | Размер* | Толщина стен** | Бесшовные | Сварной | |||||||||||||||||||||
| Локоть | 1/2″-24″ | SCH10S ~ XXS | √ | √ | |||||||||||||||||||||
| 8″-104″ | SCH5S ~ 80S / XS | √ | |||||||||||||||||||||||
| Тройник | 1/2″-24″ | SCH10S ~ XXS | √ | √ | |||||||||||||||||||||
| 8″-104″ | SCH5S ~ 80S / XS | √ | |||||||||||||||||||||||
| Редуктор | 1/2″-24″ | SCH10S ~ XXS | √ | √ | |||||||||||||||||||||
| 8″-104″ | SCH5S ~ 80S / XS | √ | |||||||||||||||||||||||
| Шапка | 1/2″-80″ | SCH10S ~ SCH160 | √ | ||||||||||||||||||||||
| Накладной шарнирный конец заглушки | 1/2″-24″ | SCH5S ~ 80S / XS | √ | √ | |||||||||||||||||||||
| 8″-80″ | SCH5S ~ 80S / XS | √ | |||||||||||||||||||||||
Standards and Manufacturing of Buttweld Fittings
- Стандарты размеров:
Fittings dimensions are governed by ASME B16.9.This ensures the buttweld ends match the stainless steel pipe.Standardized dimensions guarantee a proper fit during welding. - Material Specification:
Stainless steel fittings must comply with ASTM A403.This specification verifies the chemical composition.It ensures the material meets required corrosion standards. - Pipe Compatibility:
Fittings are made to match the wall thickness,or schedule,of the pipe.Common schedules are Schedule 40,Schedule 80,and Schedule 160.Schedule matching is vital for a smooth weld transition.
| Стандарт | Governs | Фокус |
|---|---|---|
| ASME B16.9 | Размеры | Weld ends |
| ASTM A403 | Материал | Chemistry |
| ASME B36.19 | Pipe Size | толщина стен |
Допуск углового отклонения фитингов под сварку встык ASME B16.9
| Номинальный размер | DN | 15-100 | 125-200 | 250-300 | 350-400 | 450-600 | 650-750 | 800-1050 | 1100-1200 | 1300-1500 | |||||||||||||||
| НПС | 1/2 – 4 | 5-8 | 10-12 | 14-16 | 18-24 | 26-30 | 32-42 | 44-48 | 52-60 | ||||||||||||||||
| Angularity Tolerance | Off Angle | Q | 1 | 2 | 3 | 3 | 4 | 5 | 5 | 5 | 6.4 | ||||||||||||||
| Off Plain | п | 2 | 4 | 5 | 6 | 10 | 10 | 13 | 19 | 20 | |||||||||||||||
Не нашли то, что вам нужно?
Required Accessories and Preparation
- Matching Pipe:
The fittings require matching stainless steel pipe sections.The pipe ends must also have a compatible bevel.Both components must share the same grade. - Welding Equipment:
TIG (Tungsten Inert Gas) welding is common for stainless steel.Orbital welding systems provide high-quality,repeatable welds.Proper equipment minimizes defects. - Фланцы:
Flanges are necessary to connect the welded pipeline to equipment.Фланцы с приварной горловиной are often integrated into the buttweld section.This allows for simple maintenance access.
Applications of Buttweld Fittings
- Chemical and Petrochemical:
These industries rely heavily on Buttweld Fittings.The seamless joint is necessary for transporting corrosive chemicals.High-pressure lines for reactors and distillation columns demand this integrity. - Oil and Gas Transportation:
Pipeline integrity is paramount for oil and gas.Stainless steel pipe is joined using buttweld elbows and tees.This ensures zero leakage under severe pressure and temperature fluctuations. - Выработка электроэнергии:
Steam and feedwater systems operate at extremely high heat.The joints must withstand thermal fatigue and creep.Buttweld connections provide the necessary structural reliability in these critical lines. - Food, Beverage, and Dairy:
Though often using sanitary clamp connections,some permanent CIP (Clean-in-Place) lines use butt welding.A smooth internal surface prevents bacterial traps.This is essential for hygiene and product purity.
Связаться с нами
- RM901 No.22 Tangjiaqiao Road Wenzhou Китай
- +86 577 8551 1171
- [email protected]
- https://www.kaysuns.com/
RU 
EN 
ES 
PT 
FR 
