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Industry procurement solution · Reviewed 10 August 2026

Metals for Pumps and Valves

Pump and valve material selection depends on the actual fluid, pressure, temperature, solids, velocity, cavitation, corrosion, erosion, wear, sealing and maintenance route. A piping grade cannot simply be copied to every wetted component.

01 Service environment02 System requirements03 Codes & documents04 Inspection & delivery

Answer first

There is no single metal specification for an entire project

Divide the project into systems, document each service environment and governing code, then select compatible materials, product standards, fabrication routes, protection systems and inspection plans.

01Service environment

Pressure, temperature, velocity, solids, deposits and chemical exposure

02Service environment

Cavitation, vibration, cyclic actuation and mechanical wear

03Service environment

Wetted internals, external atmosphere, insulation and mixed-metal connections

System map

Material and product selection by project system

SystemSelection drivers and alternativesReviewed starting points
Bodies, bonnets and casings
  • Define pressure-temperature rating, material class, casting/forging route, NDE and repair acceptance.
  • Verify the ordered standard, dimensions, fabrication route, inspection and traceability before release.
Carbon steel plateStainless sheet
Shafts, stems and trim
  • Evaluate corrosion, galling, wear, hardness, surface treatment and compatibility with seals.
  • Verify the ordered standard, dimensions, fabrication route, inspection and traceability before release.
316LAlloy steel
Piping interfaces and fasteners
  • Coordinate flange class, pipe material, gasket, bolting, corrosion and isolation requirements.
  • Verify the ordered standard, dimensions, fabrication route, inspection and traceability before release.
Carbon steel pipeStainless pipe
Testing and spares
  • Specify pressure/leak tests, material identification, functional testing, markings and interchangeability records.
  • Verify the ordered standard, dimensions, fabrication route, inspection and traceability before release.
Stainless pipeCarbon steel pipe

Project control

Standards, certification and documents

  • Fluid composition, solids, pressure-temperature, velocity and operating cycles
  • Valve/pump data sheets, pressure class and material class
  • Casting/forging, welding, NDE, pressure and functional test procedures
  • Certificates, PMI, test records, spare parts and traceability

Fabrication and logistics

Package interfaces to control

  • Fabrication drawings, welding, heat treatment, coating and repair procedures
  • Inspection hold points, testing methods, acceptance criteria and document approval
  • Identification through cutting and assembly, preservation, packing and consolidated shipping
  • Destination rules, site storage, installation interfaces and delivery sequence

Risk register

Common procurement risks

01

Choosing by piping grade without reviewing trim and seals

02

Ignoring cavitation, solids, erosion or galling

03

Mixing material classes across flanges, bolting and wetted parts

04

Ordering equipment without test and identification requirements

Comparable offers

Structured RFQ checklist

01RFQ input

Project location, governing code, service environment and design life

02RFQ input

System duty, material/product standard, grade and delivery condition

03RFQ input

Dimensions, tolerances, quantity, fabrication and welding requirements

04RFQ input

Inspection plan, test documents, marking, traceability and delivery destination

05RFQ input

Packing, preservation, shipping terms and required delivery date

Continue researching

productStainless Steel Pipe

A specification guide to seamless and welded stainless pipe for pressure and process service, with schedule, dimensions, heat treatment, testing, and end requirements.

productCarbon Steel Pipe

A procurement guide to seamless and welded carbon steel pipe, clarifying service specification, nominal size, schedule, manufacturing route, tests, coatings, and end preparation.

materialStainless Steel

Stainless steels are iron-based alloys whose chromium supports a protective passive film. Family, alloy content, product specification, condition, fabrication, surface state, and service environment all affect selection.

Evidence

Sources and review

Project engineering documents and current governing standards supersede this general selection map.

01
B31 Pressure Piping Codes

ASME · Code family overview, reviewed July 2026

02
ASTM A240/A240M - Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip

ASTM International · A240/A240M-26

03
Steel Pipe Product Standards Index

ASTM International · A53/A53M and A106/A106M scope; ordered edition controls

Project sourcing from China

Build a traceable Pumps & valves supply package

Share the design basis, system list, specifications, quantities, inspection plan, destination and delivery schedule.

Discuss the project