Seamless Pipes

Seamless pipes for pressure, temperature, and critical process service.

Kaizen supplies seamless pipe ranges for applications where uniform wall structure, pressure integrity, and specification-led material control are important.

Carbon and alloy steel range Stainless and duplex options Critical service documentation
Material Standards

Seamless 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 & Alloy Steel

  • Standards: ASTM A106 / A333 / A335 / A519
  • Grades: Gr. B, low temperature grades, and Cr-Mo service grades as required
  • Material Coverage: Pressure and process piping, line pipe, and high-temperature alloy steel requirements
  • Use Focus: Pressure piping, steam service, refinery lines, and power systems

Stainless Steel

  • Standards: ASTM A213 / A312 / A269
  • Grades: 304/304L, 316/316L, 321, 347 and project-approved stainless ranges
  • Material Coverage: Austenitic, duplex, and selected super duplex seamless supply
  • Use Focus: Corrosion-resistant process service and clean fluid handling

Duplex & Nickel

  • Standards: ASTM A789 / A790 / ASTM B167 / B444
  • Grades: Duplex 2205, super duplex, Inconel, Incoloy, Monel and Hastelloy types
  • Material Coverage: Nickel alloy and duplex grades for chloride, sour, and aggressive service
  • Use Focus: Higher chloride, sour, and aggressive media conditions

International

  • Code Support: EN / DIN / JIS / IBR where applicable
  • Supply Note: Final selection is matched to grade, NDT scope, and order specification
  • Grade Review: Material route is aligned to service temperature, corrosion profile, and certification demand
  • Execution: Mill source and finishing route are reviewed before dispatch
Material Overview

Seamless pipe supply with controlled technical detail.

Seamless pipes are typically selected where weld-free construction, pressure retention, and uniform mechanical performance are required in the line specification.

  • Wall thickness and schedule are matched to pressure and design temperature.
  • Grade choice is reviewed against corrosion profile, fluid service, and fabrication route.
  • NDT, hydrotest, PMI, and certification scope are aligned before supply release.
  • End condition, length, and coating or pickling status are confirmed as per project need.
Product Split

Primary seamless pipe ranges in our supply scope.

  • Process piping and line pipe grades
  • High-temperature alloy steel grades
  • Low-temperature seamless carbon steel
  • Stainless seamless pipes and tubes
  • Duplex and nickel alloy seamless products

Dimensional capability

Parameter Typical Range Notes
Outside diameter6 mm to 610 mmDepends on grade, schedule, and mill route
Wall thickness1 mm to 40 mmAligned to pressure class and manufacturing capability
LengthRandom, fixed, and cut lengthsProject-based dispatch length can be reviewed
SchedulesSch 10 to Sch XXSSelected against pressure class and wall requirement
EndsPlain, bevelled, threaded where applicableSubject to product form and order requirement
Inspection

Inspection and testing scope.

  • Visual and dimensional inspection
  • Hydrostatic test or approved substitute NDT
  • Ultrasonic or eddy current testing where applicable
  • PMI for alloy and stainless scope as specified
  • Mechanical and chemical test review
Documentation

Documents reviewed before dispatch.

  • Mill test certificates
  • EN 10204 3.1 / 3.2 where specified
  • NDT and hydrotest reports
  • IBR or third-party inspection records where required

Manufacturing Route

Hot finished and cold drawn seamless routes can be considered depending on size, tolerance, and service condition.

Processing Condition

Normalized, annealed, solution annealed, pickled, passivated, or stress relieved condition can be supplied as applicable.

Applications

Used across refinery, petrochemical, power, offshore, process skids, and OEM piping packages.

RFQ Path

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

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

Submit Specification