Welded Pipes

Welded pipes for process lines, utility systems, and larger diameter supply.

Kaizen supplies welded pipe ranges where size availability, process compatibility, and commercial practicality must align with project specifications.

Request Technical Quote Pipe Overview

ERW, EFW and SAW routes Stainless and carbon options Project-oriented quality control

Material Standards

Welded Pipes grades and material families.

Open the relevant section to review the common standards, grades, and service focus normally associated with this product category.

Carbon Steel

Standards: ASTM A53 / API 5L / ASTM A671 / ASTM A672
Forms: ERW and SAW routes for utility, process, and line service
Material Coverage: Process piping, line pipe, and larger-diameter carbon steel welded supply
Use Focus: Water, utility, structural, and general process piping

Stainless Steel

Standards: ASTM A312 / A358 / A778
Grades: 304/304L, 316/316L and other stainless project grades
Material Coverage: Austenitic stainless welded pipe and fabricated spool-grade supply
Use Focus: Corrosion-resistant process systems and fabricated pipe spools

Tube and Thin Wall Welded

Standards: ASTM A249 / A269
Forms: Welded tube products for heat transfer and instrumentation-related use
Material Coverage: Thin wall stainless and exchanger-related welded tube forms
Use Focus: Heat exchanger, condenser, and utility tubing scope

Execution Note

Weld Integrity: Weld quality and testing method are reviewed against the line class
Surface Condition: Annealed, pickled, passivated, or mill finish can be coordinated
Size Review: OD and wall combination are matched to ERW, EFW, or SAW route
Documentation: Test records and dimensional reports remain part of release review

Material Overview

Welded pipe supply with route-specific control.

Welded pipes are selected when project dimensions, wall combinations, or commercial lead time make ERW, EFW, or SAW production the practical route.

Welding process is aligned to diameter, thickness, and material family.
NDT scope is reviewed based on code, service severity, and order specification.
Bevel preparation, straightness, and weld seam condition are checked before release.
Documentation remains aligned to the approved supply standard and project requirements.

Product Split

Primary welded pipe categories in our supply scope.

ERW process pipes
EFW stainless pipes
SAW large diameter pipes
Thin wall welded stainless tubes
Project-specific fabricated welded lengths

Dimensional capability

Parameter	Typical Range	Notes
Outside diameter	12 mm to 1200 mm	Range varies by ERW, EFW, or SAW route
Wall thickness	1 mm to 40 mm	Depends on welding process and end-use class
Length	Mill random and fixed lengths	Cut lengths can be planned to project requirement
Wall Schedules	Light wall to heavy wall combinations	Depends on route, diameter, and service class
Ends	Plain, bevelled, square cut	Prepared as per installation or fabrication need

Inspection

Inspection and testing scope.

Visual and dimensional inspection
Weld seam NDT as applicable
Hydrotest or pneumatic substitute where specified
PMI for alloy and stainless orders
Mechanical and chemical review against standard

Documentation

Documents reviewed before dispatch.

Mill test certificates
NDT and weld inspection records
Hydrotest reports where applicable
Traceability and dispatch documentation

Supply Route

ERW, EFW, and SAW options are reviewed against size range, weld quality, and fabrication requirement.

Surface and Finish

Mill finish, annealed and pickled, passivated, or coated condition can be aligned to service need.

Applications

Used in process units, utility headers, fabricated pipe spools, structural piping, and large-diameter transport lines.

RFQ Path

Send size, grade, quantity, and inspection requirement for welded pipes.

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

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