Asni A234 Wpb Cap

QS Pipe Fitting: Zhejiang ASNI A234 WPB Cap

A234 WPB carbon steel cap with STD wall and a butt weld end to ASTM B16.9, for closing petroleum pipeline ends.

Quantity

Contact Now

add to cart

One-Minute Overview

A234 WPB carbon steel cap for closing petroleum pipeline ends.
1-1/2 Inch, STD wall, butt weld end, built to ASTM B16.9.
Corrosion resistance feature for outdoor racks and buried sections.
Sizes, schedules and certificates are confirmed per inquiry.

A pipe cap is a blind end, and on a live line its closed face carries the full pressure with no gasket to help. This A234 WPB version is the 1-1/2 Inch size with STD wall and a butt weld end, made to ASTM B16.9 so the outside diameter, the wall and the bevel line up with the pipe it seals. A234 WPB is the carbon steel workhorse for petroleum pipeline duty, and the corrosion resistance feature helps the closed end last in outdoor racks and buried sections. Because the cap is a closed head, the weld is the whole story once the system is live. Sizes, wall thicknesses and schedules are confirmed per inquiry, and a detailed specification sheet is available on request.

Name: A234 WPB Cap
Material: A234
Standard: ASTM B16.9
Thickness: STD
Size: 1-1/2 Inch
End: Butt Weld
Feature: Corrosion Resistance
Usage: Petroleum Pipeline
Sizes, wall thicknesses and schedules are confirmed per inquiry, and a detailed specification sheet is available on request.

A cap is a blind end, and on a live line its closed face carries the full pressure with no gasket to help. This A234 WPB version is the 1-1/2 Inch size with STD wall and a butt weld end, made to ASTM B16.9 so the outside diameter, the wall and the bevel line up with the pipe it seals. A234 WPB is the carbon steel workhorse for petroleum pipeline duty, and the corrosion resistance feature helps the closed end last in outdoor racks and buried sections. Match the cap to the run pipe material group and the pipe schedule before ordering, and check the bevel against the welding procedure. If the line will be hydrotested or extended later, note that on the drawing so the wall and weld detail suit the test pressure.

Welding a cap is a full-penetration joint on a closed end, so heat goes in but has nowhere to vent. Align the cap square, leave the root gap the procedure calls for, tack in two places and check squareness before the root pass, then cap with controlled heat input and let it cool slowly. Do not strike an arc on the crown and do not use the cap as a lifting lug. Hydrotest the section to the project pressure, inspect the bead all the way round and confirm the grade stamping on the body. Sizes, wall thicknesses and schedules are confirmed per inquiry, so ask for the specification sheet with the order and keep the material certificate with the spool records.

FAQ

Q1. What should be matched before ordering this butt weld cap?

The nominal size against the actual outside diameter, the STD wall against the pipe schedule, and the bevel preparation against the welding procedure. Keep the A234 WPB grade in the same material group as the run pipe and state the design or test pressure, because the blind face carries the full load and that sets the wall and weld detail.

Q2. Is the corrosion resistance a substitute for coating?

No, it is a durability feature. The closed end still lives under the coating system the project specifies for outdoor or buried service, and the bevels get cleaned back to bare metal before welding. Note the environment with the order so the right coating and any wrapping are planned from the start.

Q3. Can I trim the cap to fit a tight spool?

The centre-to-end and the crown are fixed by ASTM B16.9, so trimming it changes the bore and the blind face you were relying on. If the spool is tight, adjust the pipe lengths or the support layout on the drawing. A cap is the last fitting you want to modify with a grinder, because it has one job and no spare face.

Q4. What's the minimum I can order?

Standard flange insulation gasket kits start at one set, and standard gaskets, studs, washers and sleeves start at one piece. Kits made to your drawing or for a non-standard bolt pattern are quoted individually, because the minimum really depends on the material and the tooling involved.

Send Message