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 Raccords de tuyauterie en acier inoxydable are essential for any system using Tube en acier inoxydable.
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. - Résistance à la corrosion:
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
Coudes
Coudes en acier inoxydable 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.
Réducteurs
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 bride,thereby simplifying bolt alignment during assembly.
| Fitting Type | Fonction principale | Joint Profile |
|---|---|---|
| Coude | Changer de direction | Smooth flow |
| Tee | Branch line | Flow division |
| Réducteur | Change diameter | Smooth transition |
| Casquette | Line termination | Permanent seal |
Buttweld Fittings Materials and Capacity
Materials We Use For Buttweld Fittings
| Alloy Group | Caractéristiques principales | Utilisation principale |
|---|---|---|
| Acier inoxydable | Résistance à la corrosion | General Piping, Fittings |
| Duplex & Super Duplex | High Strength, Chloride Resistance | Offshore, Petrochemical |
| Alliage à base de nickel | High Temperature, Extreme Corrosion | Chemical Reactors, Furnaces |
| Alliage Cuivre-Nickel | Seawater Service | Marine, Desalination |
| Alliage de titane | Lightweight, Bio-compatibility | Aerospace, Medical, Harsh Acid |
| Carbon & Alloy Steel | Cost-Effective Strength | Standard Industrial, Power Generation |
| Matériau | Common Grades (ASTM/UNS) |
|---|---|
| Acier inoxydable | ASTM A403 304/L, 304H 310S, 310H 316/L, 316Ti, 316H 317/L 321/H 347/H S31803 S32750 904L 254SMO (S31254) |
| Duplex et Super Duplex | ASTM A815 UNS S31803, S32205, UNS S32750, S32760 |
| Alliage à base de nickel | Alloy 200, Monel 400, K500, Inconel 600, 625, Incoloy 800, 800H, 800HT, 825, alloy 20, alloy28, hastelloy C22, C276 etc. |
| Alliage cuivre-nickel | Cu70Ni30(C71500, B30), Cu90Ni10(C70600,B10) |
| Alliage de titane | Gr. 1, Gr.2, Gr.11 etc. |
| Acier Carbone | ASTM A234 WPB, WPC |
| Acier à basse température | ASTM A420 WPL3, WPL6 |
| Acier allié | ASTM A234 WP5, WP9, WP11, WP12, WP22, WP91,WP911,WPR |
| Acier à haute limite d'élasticité | ASTM A860 WPHY42, 46, 50, 52, 56, 60, 65, 70 |
*Les matériaux listés ne sont donnés qu'à titre indicatif, certains matériaux peuvent varier en fonction de la quantité, car il se peut que nous n'ayons pas de matière première en stock. Nous sommes forts pour fournir des raccords à souder en acier inoxydable 304, des raccords 316, des raccords duplex S31803, etc.
**La qualité équivalente DIN/EN est disponible, mais parfois nous utiliserons du matériel ASTM/ASME en remplacement si la quantité n'est pas considérable ou si le matériel est difficile à obtenir. Nous l'indiquerons dans l'offre.
Our Capacity For Buttweld Fittings
- Taille : de 1/2" à 104" pour les produits soudés et sans soudure.
- SCH5S, SCH10S, SCH40S, STD, SCH80S/XS, SCH100, SCH120, SCH160, SCHXXS
- Extrémité de connexion : Soudée bout à bout.
| Produit | Taille* | Épaisseur du mur** | Sans couture | Soudé | |||||||||||||||||||||
| Coude | 1/2″-24″ | SCH10S~XXS | ?? | ?? | |||||||||||||||||||||
| 8″-104″ | SCH5S~80S/XS | ?? | |||||||||||||||||||||||
| Tee | 1/2″-24″ | SCH10S~XXS | ?? | ?? | |||||||||||||||||||||
| 8″-104″ | SCH5S~80S/XS | ?? | |||||||||||||||||||||||
| Réducteur | 1/2″-24″ | SCH10S~XXS | ?? | ?? | |||||||||||||||||||||
| 8″-104″ | SCH5S~80S/XS | ?? | |||||||||||||||||||||||
| Casquette | 1/2″-80″ | SCH10S~SCH160 | ?? | ||||||||||||||||||||||
| Joint à recouvrement Bout d'arbre | 1/2″-24″ | SCH5S~80S/XS | ?? | ?? | |||||||||||||||||||||
| 8″-80″ | SCH5S~80S/XS | ?? | |||||||||||||||||||||||
Standards and Manufacturing of Buttweld Fittings
- Normes dimensionnelles:
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.
| Standard | Governs | Focus |
|---|---|---|
| ASME B16.9 | Dimensions | Weld ends |
| ASTM A403 | Matériau | Chemistry |
| ASME B36.19 | Pipe Size | épaisseur du mur |
Tolérance angulaire des raccords soudés bout à bout ASME B16.9
| Taille nominale | DN | 15-100 | 125-200 | 250-300 | 350-400 | 450-600 | 650-750 | 800-1050 | 1100-1200 | 1300-1500 | |||||||||||||||
| NPS | 1/2 – 4 | 5-8 | 10-12 | 14-16 | 18-24 | 26-30 | 32-42 | 44-48 | 52-60 | ||||||||||||||||
| Angularity Tolerance | Hors angle | Q | 1 | 2 | 3 | 3 | 4 | 5 | 5 | 5 | 6.4 | ||||||||||||||
| Hors plaine | P | 2 | 4 | 5 | 6 | 10 | 10 | 13 | 19 | 20 | |||||||||||||||
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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. - Brides:
Flanges are necessary to connect the welded pipeline to equipment.Brides à souder 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. - Production d'électricité :
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.
Nous contacter
- RM901 No.22 Tangjiaqiao Road Wenzhou Chine
- +86 577 8551 1171
- [email protected]
- https://www.kaysuns.com/
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