Socket Weld Caps

ASME B16.11 | Forged Socket Weld Cap | Class 3000–9000 | NPS 1/8–4

Elite is a manufacturer and supplier of high-quality Forged Socket Weld Caps for industrial piping and process applications. These fittings are manufactured using controlled forging and precision-machining processes to provide reliable dimensional accuracy, mechanical strength, and consistent performance.

A Socket Weld Cap is a forged fitting used to close the end of a pipe or piping component. The fitting incorporates a socket-weld connection that allows the pipe to be inserted into the recessed socket and welded in place. Stainless Steel Socket Weld Caps provide excellent corrosion resistance and are widely used in small-bore piping, process systems, instrumentation, chemical service, and other demanding applications.

ASME B16.11 Forged Socket Weld Caps are available in a wide range of sizes, pressure classes, and materials. Elite supplies carbon steel, stainless steel, alloy steel, duplex, super duplex, copper-nickel, nickel alloys, titanium, and other specialty materials according to customer and project requirements.

ASME B16.11 Forged Socket Weld Cap – Available Types

Forged Socket Weld Cap Socket Weld Pipe Cap
Forged Socket Weld Pipe Cap Socket Weld Forged Cap
ASME B16.11 Forged Socket Weld Cap Forged Pipe Cap – Class 3000
Class 6000 Socket Weld Pipe Cap Class 9000 Socket Weld Pipe Cap
Stainless Steel Socket Weld Cap SS Forged Socket Weld Pipe Cap
Carbon Steel Socket Weld Cap Alloy Steel Socket Weld Pipe Cap
Duplex Steel Socket Weld Cap Super Duplex Steel Socket Weld Cap
Copper-Nickel Socket Weld Cap Nickel Alloy Socket Weld Cap
High Nickel Alloy Forged Socket Weld Cap Hastelloy Socket Weld Cap
Titanium Forged Socket Weld Cap Inconel Socket Weld Cap
ASTM A182 Socket Weld Stainless Steel Cap Custom Forged Socket Weld Cap

Standard Specification for Forged Socket Weld Cap

Specification Details
Dimensions ASME B16.11
Size NPS 1/8 to 4
Pressure Class Class 3000, 6000, 9000
Form Socket Weld Cap / Forged Cap / Pipe Cap
Connection Socket Weld
Construction Forged
Closure Type Pipe-End Closure
Heat Treatment As required by material specification
Inspection Visual, Dimensional, PMI, NDE as specified
Marking Size, Class, Material, Heat Number and Manufacturer Identification
Documentation MTC, EN 10204 3.1 / 3.2, COC, Inspection Reports

Custom Engineering

Elite can supply Socket Weld Caps according to customer drawings, piping specifications and project requirements.
Custom Requirement Options
Nominal Size NPS 1/8–4
Pressure Class 3000 / 6000 / 9000
Cap Type Socket Weld Cap
Material CS / SS / Alloy / Duplex / Nickel / Specialty
Connection Socket Weld
Socket Bore Standard / Special
Socket Depth Standard / Custom
Wall Thickness Standard / Heavy Wall
End Wall Thickness As Required
Heat Treatment As Material Specification
NDE PMI / UT / MT / PT
Inspection Customer / Third Party
Marking Standard / Customer-Specific
Documentation MTC / COC / Inspection Package

Connection & Dimensional Options

Item Available Options
Nominal Size NPS 1/8–4
Pressure Class Class 3000 / 6000 / 9000
Connection Socket Weld
Cap Type Forged Socket Weld Cap
Socket Bore ASME B16.11 / Project Requirement
Socket Depth ASME B16.11 / Project Requirement
Socket Wall Thickness Class and material dependent
End Wall Thickness Class and material dependent
Material Carbon Steel / Stainless Steel / Alloy / Duplex / Nickel / Cu-Ni / Titanium
Heat Treatment As required by material specification
NDE PMI / UT / MT / PT as specified
Marking Standard / Customer-Specific

Inspection & Documentation

Inspection / Document Availability
Material Test Certificate Available
EN 10204 3.1 Standard
EN 10204 3.2 When specified
Certificate of Conformity Available
Dimensional Inspection Report Available
Chemical Analysis Available
Mechanical Test Results Available
Heat Treatment Records When applicable
PMI On Request
UT / MT / PT On Request
Visual Inspection Standard
Third-Party Inspection On Request
Inspection & Test Plan Project-Specific
Packing & Marking Records Available

Applicable Standards

  • ASME B16.11 – Forged Fittings, Socket-Welding and Threaded
  • ASME B31.3 – Process Piping, where applicable
  • Applicable ASTM / ASME material specifications
  • NACE MR0175 / ISO 15156, when specified for sour-service applications
  • Customer drawings, specifications and project requirements

Standards Note: ASME B16.11 designates socket-weld forged fittings as Class 3000, 6000 and 9000. Class 2000 is a threaded-fitting designation and is therefore not included for socket-weld caps.

The standard size range for ASME B16.11 socket-weld caps extends through NPS 4. Published dimensional references identify socket bore, socket wall thickness, socket depth and end-wall thickness as key cap dimensions.

Material & Grades of Forged Socket Weld Cap

Stainless Steel Forged Socket Weld Cap:
ASTM A182 F304, F304L, F304H, F316, F316L, F316H, F316Ti, F316LN, F317, F317L, F321, F321H, F347, F347H, F309S, F309H, F310S, F310H, F904L and other stainless steel grades available upon request.

Duplex & Super Duplex Steel Forged Socket Weld Cap:
ASTM A182 F51, F53, F55, UNS S31803, S32205, S32550, S32750, S32760, S32950 and other duplex or super duplex grades.

Carbon Steel Forged Socket Weld Cap:
ASTM A105, A105N, ASTM A350 LF2, LF3 and other suitable carbon steel forging grades according to project requirements.

Alloy Steel Forged Socket Weld Cap:
ASTM A182 F1, F5, F9, F11, F12, F22, F23, F91, F92 and other alloy steel grades for elevated-temperature and high-pressure applications.

Copper & Copper-Nickel Forged Socket Weld Cap:
ASTM / ASME SB111, ASTM / ASME SB466, UNS C10100, C10200, C10300, C10800, C12000, C12200, C70600 Cu-Ni 90/10, C71500 Cu-Ni 70/30 and other copper-nickel alloys.

Nickel Alloy Forged Socket Weld Cap:
ASTM / ASME SB160, SB163, SB336, SB366, SB407, SB564, UNS N02200 Nickel 200, N02201 Nickel 201, N04400 Monel 400, N05500 Monel K500, N08020 Alloy 20, N08825 Inconel 825, N06600 Inconel 600, N06601 Inconel 601, N06625 Inconel 625, N10276 Hastelloy C276 and other nickel-based alloys.

Titanium & Special Alloy Forged Socket Weld Cap:
Titanium grades, corrosion-resistant alloys, high-temperature alloys and other specialty materials are available according to customer specifications and project requirements.

Configurations

Elite offers Socket Weld Caps in various configurations:

  • Standard Forged Socket Weld Cap
  • Heavy-Wall Socket Weld Cap
  • High-Pressure Socket Weld Cap
  • Stainless Steel Socket Weld Cap
  • Carbon Steel Socket Weld Cap
  • Alloy Steel Socket Weld Cap
  • Duplex & Super Duplex Socket Weld Cap
  • Copper-Nickel Socket Weld Cap
  • Nickel Alloy Socket Weld Cap
  • Titanium Socket Weld Cap
  • Special / Custom Forged Socket Weld Cap

Manufacturing & Quality

Elite manufactures Socket Weld Caps using controlled forging, heat treatment, machining, and inspection processes to maintain consistent quality and dimensional accuracy.

Quality control includes:

  • Raw material verification
  • Heat-number traceability
  • Forging
  • Heat treatment
  • CNC machining
  • Socket machining
  • Dimensional inspection
  • Surface and visual inspection
  • Positive Material Identification (PMI)
  • UT / MT / PT where specified
  • Final inspection
  • Marking and traceability
  • Protective packing for shipment

Product Types

Elite supplies:

  • Forged Socket Weld Cap
  • Socket Weld Pipe Cap
  • Class 3000 Socket Weld Cap
  • Class 6000 Socket Weld Cap
  • Class 9000 Socket Weld Cap
  • Carbon Steel Socket Weld Cap
  • Stainless Steel Socket Weld Cap
  • Alloy Steel Socket Weld Cap
  • Duplex Steel Socket Weld Cap
  • Super Duplex Socket Weld Cap
  • Copper-Nickel Socket Weld Cap
  • Nickel Alloy Socket Weld Cap
  • Monel Socket Weld Cap
  • Inconel Socket Weld Cap
  • Hastelloy Socket Weld Cap
  • Titanium Socket Weld Cap
  • Custom Forged Socket Weld Cap

Design Features

  • Forged construction for high mechanical strength
  • Compact pipe-end closure design
  • Socket-weld connection for permanent installation
  • Precision-machined socket bore
  • Controlled socket depth and wall thickness
  • Suitable for small-bore and high-pressure piping systems
  • Available in corrosion-resistant and specialty materials
  • Excellent dimensional consistency
  • Heat-number and material traceability
  • PMI and NDE available for critical applications
  • Custom material and inspection requirements available

Forged Socket Weld Pipe Cap Application

  •  Stainless Steel Forged Socket weld Pipe Cap uses in Oil and Gas Pipeline
  •  Forged Socket weld Pipe Cap uses in Chemical Industry
  •  Alloy Steel Socket weld Pipe Cap uses in Plumbing
  •  Forged Socket weld End Pipe Caps uses in Heating
  •  Socket weld Forged Pipe Caps uses in Water Supply Systems
  •  ANSI B16.11 Forged Socket weld Pipe Cap uses in Power Plant
  •  Socket weld Pipe Cap uses in Paper & Pulp Industry
  •  Forged Socket weld Pipe Caps uses in General Purpose Applications
  •  Forged Socket weld Pipe Cap uses in Fabrication Industry
  •  Forged Socket weld Pipe Cap uses in Food Processing Industry
  •  Forged Socket weld Pipe Caps uses in Structural Pipe

Ordering Information

When ordering Socket Weld Caps, specify:

Nominal Size + Pressure Class + Material + Connection + Socket Bore + Quantity + Inspection Requirements

Example

2″ Class 6000 Socket Weld Cap, ASTM A105N, Forged Construction, ASME B16.11, Socket Weld Connection, EN 10204 3.1.

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