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End Cap (C)
SDFL
The GB/T 12459 DN50 Sch10S stainless steel flat end cap is a butt-weld pipe fitting designed for sealing the ends of pipeline systems and pressure vessels. Manufactured with standard-compliant forming processes, this product fits pipeline systems of multiple standard systems, serving industrial clients in petrochemical, power generation, water treatment, and pharmaceutical sectors.
The flat end cap is produced in accordance with GB/T 12459, as well as ASME B16.9, EN 10253-2, JIS B2312 and ISO 5251. This multi-standard compliance allows the product to be compatible with pipeline systems designed under different national or regional standard systems, supporting cross-regional engineering project procurement. The production process follows the dimensional tolerance and material requirements specified in each standard, ensuring interchangeability with matching pipe fittings and pipelines.
Multiple stainless steel and alloy grades are available for different working conditions, all sourced with traceable material certificates:
ASTM A403 WP304L: Suitable for general water, gas and mildly corrosive medium pipelines, with good weldability and formability.
ASTM A403 WP316L: Suitable for scenarios with moderate corrosion requirements, such as seawater systems and chemical processing pipelines with chloride media.
ASTM A815 UNS S31803 (Duplex Stainless Steel): Suitable for medium-to-high strength and corrosion resistance scenarios, with higher pressure bearing capacity than common austenitic stainless steel.
UNS S31254 (254 SMO): Suitable for high-chloride and strong corrosion environments, such as desalination systems and flue gas desulfurization pipelines.
UNS N06625 (Inconel 625): Suitable for high-temperature and strong corrosion working conditions, with stable performance in extreme chemical environments.
The following table is retained from the original product page:
Quantity:1 Additional basic parameters: Model: End Cap (C); Brand: SDFL; Nominal pipe size: DN50; Wall thickness schedule: Sch10S; Connection type: Butt-weld.
Parameter | Value | Unit |
|---|---|---|
Outside diameter of mating pipe | 60.3 | mm |
Nominal wall thickness | 2.77 | mm |
Overall height of end cap | 38 | mm |
Bevel angle | 30-35 | degree |
Note: Dimensional tolerances follow the requirements of the corresponding production standard. | ||
The pressure bearing capacity of the end cap varies by material and working temperature. At room temperature (20°C), the allowable working pressure of 304L material reaches PN100 under standard calculation conditions. Pressure rating decreases as working temperature rises, and specific values should be calculated based on actual material and temperature parameters.
Pressure vessel head: Used for sealing the ends of reactors and storage tanks, applicable to pressure equipment with design pressure up to PN100, providing stable end closure for fluid containment.
Pipeline system maintenance: Configurable with lifting lugs for temporary pipe isolation during maintenance and shutdown operations, facilitating disassembly and reinstallation in pipeline renovation projects.
Nuclear power safety systems: Forged grade materials are available for steam generator end closures in nuclear power facilities, with material properties meeting radiation-resistant requirements of relevant nuclear grade specifications.
For cryogenic working conditions, corresponding low-temperature approved stainless steel grades should be selected based on actual temperature requirements. For high-temperature and corrosive scenarios, material selection should be verified through chemical composition and mechanical property data to ensure long-term operation stability.
The flat end cap is manufactured through cold press forming, followed by edge beveling and surface finishing. The forming process ensures uniform wall thickness distribution and consistent dimensional accuracy. Each product undergoes edge treatment to meet butt-weld installation requirements, with smooth bevel surfaces free of burrs and cracks.
All products undergo inspection procedures before delivery, including dimensional verification, surface quality inspection, and material composition verification via spectral analysis. Non-destructive testing items can be added according to client requirements, with corresponding inspection reports provided upon request.
Yes, this product is designed and produced in compliance with GB/T 12459 specifications, with dimensions and material requirements aligned with the standard. It can be directly matched with GB/T 12459 standard pipelines and fittings.
Material selection depends on the type, concentration and temperature of the corrosive medium. 316L is suitable for most weakly to moderately corrosive scenarios, while 254 SMO or Inconel 625 is recommended for high-chloride or strong acid environments. Clients may provide medium parameters for targeted material recommendation.
Yes, custom configurations including lifting lugs, special bevel angles and non-standard dimensions are supported. Clients can provide design drawings or specific parameter requirements for customization confirmation.
For commercial procurement requirements including bulk orders and custom specifications, clients may contact the technical team for parameter confirmation and quotation.
