Forms and finishes

Stainless Steel High-Pressure Pipe & Tube

Enquire for stainless pipe or tubing to a project specification. Include design conditions, dimensions, material and inspection needs.

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Technical reference

Specifications and ordering data

Specification

Field	Order reference
Standard	Project design code plus approved pipe or tube product specification
Product or route	Welded piping assembly or tubing with a specified connection system
Critical dimensions and fit	State design pressure, temperature, fluid, minimum wall and the exact fitting series
Supply enquiry	Confirm sizes, lengths, route, documentation and lead time for your order

Dimensions and weight

Illustrative drawing sizes. The bore and mass are calculated from the nominal dimensions. Use the project tolerance and confirm the size and route in the quote.

Tube OD (mm)	Wall (mm)	Nominal bore (mm)	Estimated kg/m at 8,000 kg/m³
12	1.5	9.00	0.40
12	2	8.00	0.50
12	2.5	7.00	0.60

Service and pressure basis

Use the approved design code and service conditions. The applicable rating depends on material, temperature, minimum effective wall, joint details and the limits of the connected assembly. A schedule or a hydrostatic test result alone cannot establish an operating pressure.

Reference ASME process piping code B31.3

Chemical composition

The grade on the purchase line controls chemistry. Specify the grade with the finished product standard or drawing.

Check	What to match
Grade and specification	TP or UNS on the quotation and material report
Heat analysis	Full limits and any stabilising or alloy additions under the ordered edition

Reference ASTM steel standards

Mechanical properties

Read tensile and yield data against the approved grade and condition. Use the design code and the connection limits to establish service conditions.

Check	What to verify
Condition	Heat treatment or cold-work condition stated for the offered form
Acceptance	Project-specified dimensions and relevant test records

Reference ASTM steel standards

Testing and certificates

Check traceability and the specified acceptance tests for the entire order.

When	What to check
Before ordering	Document the required test method, edition and any witness points
At delivery	Match the material report and heat or lot identification to the shipment

Application and product comparison

Compare the approved connection ratings alongside the pipe or tube material.

For the enquiry, state design pressure, temperature, fluid, minimum wall and the exact fitting series.

Example request for quotation

Project design code plus approved pipe or tube product specification · 12 × 1.5 mm. Add quantity, lengths, delivery city and the required reports.

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Ordering guidance

Quote the design requirement, not a generic pressure rating

Start with the product specification, material grade and dimensions set by the design authority. Include design pressure, design temperature and the applicable code as context for the quotation; grade or schedule alone is not an approved rating.

Identify whether seamless or welded product is required and include applicable wall tolerances, examination or test documents. For an existing system, send the line class or drawing rather than choosing material from a pressure label.

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Illustration: Three round pipe and tube cross-sections

Buyer’s guide

Specify high-pressure tubing around the assembled system

Start with the design basis and the connection

“High pressure” is a service description. Provide the governing design code, design pressure and temperature, fluid and approved material from the project documents. Identify whether the line is welded pipe, compression tube or a specified high-pressure connection system. Each uses a different dimensional basis, and the permitted tube wall, OD, hardness and finish may depend on the selected fittings.

Check minimum wall and tolerances

For a pipe callout, give NPS, schedule or required wall and the end details. For tube, give actual OD and wall, then clarify minimum or nominal wall and applicable tolerance. Send cyclic or transient conditions to the project reviewer if relevant. Use the assembled system’s approved design limits when comparing options.

Make the required examinations explicit

State the tests, material records, traceability and witness requirements specified on the inspection plan. Agree whether certificates refer to the full supplied length or the original parent tube. If an alternate route or dimension is quoted, capture it as a deviation for technical review.

Example enquiry

For a pressure-test skid, submit the fitting series, tube OD and wall, required grade and condition, and the project design pressure and temperature. Attach the approved inspection schedule so the technical and commercial quotes cover the same scope.

Can the supplier give a working pressure from wall thickness alone?

Use the approved calculation and fitting or assembly limits. Diameter, tolerances, material condition, temperature and connection details affect the result.

Technical references ASME B36.19 pipe dimensions · ASTM steel standards directory

Prepare your enquiry

What to put on the purchase list

Item	What to send
Product details	Design code · pressure and temperature · grade · OD or NPS · wall · inspection scope
Delivery	Quantity with units, delivery city and required date if known
Acceptance	Required certificates and inspection scope; attach the drawing revision where applicable

Can a supplier’s quote establish the allowable operating pressure?

No. Use the approved design and applicable code for the assembled system.

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Project enquiries

Request pricing and availability

Send your dimensions, quantities and delivery city. Include any inspection or material certificate requirements so they can be quoted against the same line items.

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