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Description of Steel Cap?
Pipe Caps act as protective devices and are designed to protect the pipe ends of various shapes. The main purpose of using pipe caps is to waterproof the connections. They are also used to close the ends of hydraulic or pneumatic pipes and tubes. They are used in the plumbing apparatus of domestic, commercial, and industrial water supply lines, machinery, and processing equipment, etc. They are also fitted on water pump lines with the sole purpose of removing air blocks. Pipe caps are highly demanded as an important category of pipe fittings. A steel pipe cap is also called a steel plug; it is usually welded to the pipe end or mounted on the external thread of the pipe end to cover the pipe fitting. To close the pipeline, the function is the same as that of the pipe plug.
Types of Pipe Caps:
Pipe caps come in many different types, and the type varies according to the application. However, pipe caps also vary depending on their construction features, and the buyer needs to know the right type of pipe cap. Based on construction, pipe caps are of the following types:
Threaded Caps:
These caps are female-threaded. The thread can be either straight or tapered, also referred to as NPT. Generally, caps have a female thread and plugs have a male thread.
Tapered Caps:
These caps have tapered sides, which offer a close fit. Some of these fittings can be used either as a cap or a plug. Tapered caps and plugs are multi-functional and go well with male and female NPT threads, straight tubes and bars, and male straight threads. These fittings have a tapered body to provide a secure and firm friction fit while facilitating easy removal. The tapered caps are designed to provide protection for all internal and external, threaded and non-threaded fittings against damage, dirt, or moisture that can occur.
Anti-Roll Caps:
These caps are round in shape with a slightly square end. This prevents pipes and tubes from rolling.
BW Steel Cap:
The BW steel pipe cap is a butt-welded type of fitting; the connecting method is to use butt welding. So the BW cap ends in beveled or plain.
Socket Weld Steel Pipe Cap:
The socket weld cap is used to connect pipes and caps by inserting the pipe into the access shoulder area of the socket weld cap.
Pipe Cap Material Grades
| Stainless Steel Pipe Cap | ASTM A403 WP Gr. 304, 304H, 309, 310, 316, 316L, 317L, 321, 347, 904L |
| Carbon Steel Pipe Cap | ASTM A 234 WPB, WPBW, WPHY 42, WPHY 46, WPHY 52, WPH 60, WPHY 65 & WPHY 70. |
| Low Temperature Carbon Steel Pipe Cap | ASTM A420 WPL3, A420 WPL6 |
| Alloy Steel Pipe Cap | ASTM / ASME A/SA 234 Gr. WP 1, WP 5, WP 9, WP 11, WP 12, WP 22, WP 91 |
| Duplex Pipe Cap | ASTM A 815, ASME SA 815 UNS NO S31803, S32205. Werkstoff No. 1.4462 |
| Nickel Alloy Pipe Cap | ASTM / ASME SB 336 UNS 2200 ( NICKEL 200 ), UNS 2201 (NICKEL 201 ), UNS 4400 (MONEL 400 ), UNS 8020 ( ALLOY 20 / 20 CB 3, UNS 8825 INCONEL (825), UNS 6600 (INCONEL 600 ), UNS 6601 ( INCONEL 601 ), UNS 6625 (INCONEL 625), UNS 10276 ( HASTELLOY C 276 ) |
