Stub Ends

Stub ends for lap joint flange assemblies.

Kaizen supplies stub ends in suitable material grades, sizes, pressure classes, and finishes with inspection and documentation support for the intended application.

Elbows, tees, reducers Stub Ends Fabricated piping support
Material Standards

Stub Ends grades and material coverage.

Review the material routes, common standards, grade families, and service notes used for this product category.

Carbon & Alloy Steel

  • Standards: ASTM A234 / A420 / MSS SP-75
  • Grades: WPB, WPL6, chrome-moly and line-pipe-related fitting grades
  • Material Coverage: Process piping, low temperature, and higher temperature alloy service
  • Use Focus: Pressure piping and plant fabrication

Stainless & Duplex

  • Standards: ASTM A403 / A815
  • Grades: 304/304L, 316/316L, 321, 347, duplex and super duplex ranges
  • Material Coverage: Austenitic, duplex, and super duplex fitting supply
  • Use Focus: Corrosion-resistant process systems

Nickel Alloys

  • Standards: ASTM B366
  • Grades: Inconel, Incoloy, Monel, Hastelloy, Alloy 20 and approved nickel alloy families
  • Material Coverage: Aggressive media and elevated corrosion-risk environments
  • Use Focus: Chemical and severe-service applications

Dimensional Standards

  • ASME: B16.9 and B16.28 where applicable
  • Wall Match: Schedule pairing is aligned to connected pipe thickness
  • Execution: Bevel, end prep, and marking remain subject to order scope
  • Documents: MTC and traceability are reviewed before release
Material Overview

Stub Ends selection, sizing, and supply details.

Stub Ends is selected where product geometry, material grade, dimensional fit, and documentation need to match the final service requirement.

  • Material family is reviewed against service condition and fabrication route.
  • Dimensional requirement is aligned to installation, assembly, and project class.
  • Inspection, marking, and documentation are checked before release.
  • Supply condition remains subject to order-specific requirement and material route.
Product Split

Primary stub ends supply scope.

  • Stub Ends standard supply route
  • Stub Ends material options
  • Stub Ends size and class review
  • Stub Ends documentation and inspection
  • Stub Ends application-based execution

Dimensional capability

Parameter Typical Range Notes
Nominal size1/2 in to 48 inLarge size range depends on fitting type and route
Wall thicknessSch 10 to Sch XXSMatched to connected pipe schedule
EndsBevelled and plain endsPrepared as per welding and installation need
ConfigurationLR, SR, concentric, eccentric, equal, reducingVaries by fitting form
Inspection

Inspection and testing scope.

  • Visual and dimensional inspection
  • PMI and NDT where specified
  • Marking and traceability review
  • Material certification check
Documentation

Documents reviewed before dispatch.

  • Mill test certificates
  • Inspection and test records as applicable
  • Dimensional review and dispatch documents
  • Traceability and packing support

Fabrication Use

Suitable for fabricated spools, process modules, utility headers, and field-installed piping systems.

Supply Condition

Seamless, welded, or fabricated fitting route is reviewed against size range and service requirement.

Inspection

Visual, dimensional, PMI, NDT, and certification review can be aligned to project expectations.

RFQ Path

Share size, material, quantity, and inspection scope for stub ends.

Our team reviews product form, material grade, dimensional requirement, testing scope, and delivery schedule before issuing the technical offer.

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