Views: 360 Author: Lasting Titanium Publish Time: 2026-10-21 Origin: Site
Content Menu
>> What ASTM B862 covers—and why the edition matters
>> ASTM B862 grades: start with service conditions
>> Welded or seamless: specify the product form
>> Pipe dimensions: NPS is not the actual outside diameter
>> Manufacturing and weld requirements: avoid assumptions
>> Inspection and acceptance: name the tests and criteria
>> Dimension and condition checks to include in the RFQ
>> Traceability and documents: connect the pipe to its records
>> Handling, end protection, and export packaging
>> Supplier evaluation and total procurement cost
>> A practical ASTM B862 RFQ checklist
>>> 1. What is ASTM B862 used for?
>>> 2. How many grades does ASTM B862 cover?
>>> 3. Does ASTM B862 specify one welding method?
>>> 4. Is NPS the same as actual outside diameter?
>>> 5. Are all the listed inspections mandatory for every B862 order?
>>> 6. What should an ASTM B862 RFQ include?
>> Conclusion
>> References
ASTM B862 covers titanium and titanium-alloy welded pipe. The standard specifies that welded pipe is made from annealed flat-rolled products by a welding process and may be further reduced by cold or hot working. Its scope is for general corrosion-resisting and elevated-temperature service. [astm]
The grade count depends on the edition. ASTM B862-23 lists 33 grades, but buyers should not assume that number will remain unchanged in later revisions. State the required edition in the purchase order and verify the grade table and applicable requirements against that edition. [astm] [astm]
ASTM's current listing identifies ASTM B862-23 as the active standard. The purchaser should nevertheless use the edition specified in the contract, design basis, or end-user requirements; the latest edition is not automatically the contractually required one. [astm]
The designation does not, by itself, establish suitability for every chemical, concentration, temperature, pressure, or operating cycle. Nor should buyers assume it defines every project requirement for weld examination, surface condition, dimensional tolerances, packaging, or documentation. Specify additional requirements clearly in the inquiry and purchase order.
Grade selection should follow the engineering requirements of the application—not simply availability or a supplier's recommendation. ASTM B862 includes commercially pure titanium and alloy grades, with requirements that vary by grade and edition. [astm]
Before specifying a grade, assemble the service information your materials or corrosion engineer needs:
- Process medium: Chemical identity, concentration, impurities, and possible contaminants.
- Operating conditions: Temperature, pressure, flow, and start-up, shutdown, or cleaning cycles.
- Design requirements: Applicable code, mechanical loads, required wall thickness, and joining details.
- Fabrication needs: Bending, forming, machining, welding, or other downstream operations.
Grade 2 is a commercially pure titanium grade often considered for corrosion-resistant applications, but popularity does not establish suitability for a particular process. For any grade, confirm that the material meets the project's design and corrosion requirements.
| Procurement question | Information to establish |
|---|---|
| What is the service? | Medium, concentration, impurities, temperature, pressure, and operating cycle |
| Which grade is required? | Exact ASTM grade and any project-required UNS designation |
| What design basis applies? | Governing code, design conditions, and allowable dimensions |
| What must be delivered? | Product form, size, quantity, condition, inspection, and records |
ASTM B862 is for welded titanium and titanium-alloy pipe. ASTM B861 is the specification for seamless titanium and titanium-alloy pipe. These product forms should not be treated as interchangeable without approval from the project's design authority. [astm] [titanium]
If the project permits either product form, state the permitted standards and the approval process for any proposed substitution. Otherwise, write the required manufacturing route into the order—for example, "welded pipe to ASTM B862"—so quotations can be compared on the same basis.
NPS is a dimensional designation, not necessarily the pipe's actual outside diameter in inches. Buyers should state whether the project uses NPS/Schedule, exact outside diameter and wall thickness, or a project-specific dimensional basis. [astm]
Distinguish clearly among:
- Pipe specified by NPS and Schedule, where that is the project's dimensional system.
- Tube specified by actual outside diameter × wall thickness, where applicable.
- Drawing dimensions in millimetres, including required tolerances.
For every order, provide outside diameter, wall thickness, length, tolerances, and quantity. If the project uses NPS/Schedule, confirm the corresponding actual dimensions with the supplier and design documents.
For large-diameter pipe, particularly NPS 8 and larger, ASTM B862 notes that it is most frequently custom-made for an order. Confirm availability, tooling, wall-thickness options, tolerances, and production feasibility before finalizing the specification. This does not mean such pipe cannot be produced as standard, necessarily costs more, or has greater quality risk. [astm]
ASTM B862 identifies the starting material and the use of a welding process, but the product designation alone does not promise one specific welding method or shielding arrangement. Titanium welding generally requires control of atmospheric contamination. The exact welding process, shielding arrangement, consumables, and post-weld cleaning or treatment are not established by the product designation alone. The purchase documents should identify the requirements that apply to the order. [astm]
For orders where weld details matter, ask the manufacturer to confirm applicable production controls and provide the records required by the project. The inquiry may need to address:
- Parent material: Grade, heat or lot number, material standard, dimensions, and material certificate.
- Starting stock: Whether strip or plate is used, and how its traceability links to the finished pipe.
- Splices: Whether parent-material splices are permitted and, if so, how they are identified and controlled.
- Weld configuration: Longitudinal seam, single or multiple seams, and any required seam-position limits.
- Weld profile and appearance: Requirements for reinforcement, surface condition, colour, or other specified criteria.
- Post-weld requirements: Whether cleaning, pickling, passivation, heat treatment, or other treatment is required by the order.
These are procurement considerations, not claims that ASTM B862 requires every listed detail for every order. Set acceptance criteria with the design and quality teams before production—especially for pressure-containing, safety-critical, corrosive, high-temperature, cyclic-loading, or other project-defined critical service.
The inspection scope depends on the applicable edition, grade, size, condition, and order requirements. Distinguish between requirements in the governing edition of ASTM B862 and additional project-specific inspections. Do not describe an optional or contract-added test as universally required by the standard. [astm]
Depending on those factors, an agreed inspection plan may include:
- Chemical analysis and tensile testing.
- Flattening or reverse-flattening tests.
- Hydrostatic testing.
- Electromagnetic or ultrasonic examination.
- Liquid-penetrant examination.
- Dimensional inspection and marking review.
The purchase order should identify which tests apply, their extent or frequency, acceptance criteria, and required records. For nondestructive examination, avoid vague phrases such as "100% tested" unless the method, coverage, procedure, and acceptance basis are also defined.
A practical receiving check can help prevent product and document mix-ups:
1. Match the delivery to the order: Check standard and edition, grade, dimensions, condition, quantity, and identification.
2. Verify traceability: Confirm that pipe markings and package labels link to the material records.
3. Review reports: Compare reported results with purchase requirements and applicable acceptance criteria.
4. Inspect physical condition: Check dimensions and the specified surface, ends, and internal condition.
5. Record discrepancies: Document nonconformities before the material is cut, processed, or installed.
A dimensional requirement is most useful when the inspection method and acceptance limits are clear. "Check wall thickness," for example, is less actionable than defining measurement locations, tolerance, and minimum acceptable thickness.
| Inspection area | Items to define or verify |
|---|---|
| Outside diameter | Actual measured diameter, tolerance, and roundness or ovality criteria |
| Wall thickness | Nominal and minimum thickness, tolerance, and measurement locations |
| Length | Fixed, random, or multiple lengths; length tolerance |
| Straightness | Applicable limit, such as per length or over the full pipe |
| Ends | Plain, bevelled, chamfered, capped, or another specified preparation |
| Outside surface | Acceptance criteria for scratches, dents, marks, oxidation colour, and contamination |
| Inside surface | Requirements for cleanliness, weld bead, spatter, scale, or other internal condition |
These details should reflect the service and fabrication needs. End preparation and length tolerances may affect fit-up, while surface and cleanliness requirements may matter for downstream processing. Replace undefined terms such as "premium finish" with measurable acceptance criteria.
Ask the supplier to identify the documentation package required for the order. Depending on the contract and quality plan, this may include a material test report, heat or lot identification, dimensional inspection records, test results, and a certificate of conformity. Agree on the required documents and content before placing the order.
For flat-rolled parent material, buyers may need records linking the parent stock to the finished pipe. Confirm the parent-material grade, heat or lot number, applicable material standard, and dimensions. If splices are permitted, specify how they must be documented and identified. State any requirements for parent-material records and seam position in the contract; do not assume they are included unless agreed.
The objective is traceability: the pipe identification should connect to the finished-product records and the material and test documentation required by the order.
Handling and packaging requirements can help protect pipe during storage and transport. In the RFQ, define the protection appropriate to your product condition, route, and receiving process. Consider specifying:
- End protection: Caps or other protection to reduce the risk of end damage and debris entering the pipe.
- Surface separation: Independent or suitably separated packing to limit scratches and direct contact with other metals.
- Cleanliness and dryness: Clean, dry internal packaging where required by the project.
- Export packing: Moisture protection and packaging suitable for the expected transport and storage conditions.
- Identification: Consistent marking and label locations that remain readable through shipment and receiving.
- Handling instructions: Agreed lifting and support methods to reduce impact, deformation, or surface damage.
Do not rely on general terms such as "export packing" alone. Define the packaging and marking requirements that matter to your application, and confirm how nonconforming or damaged material should be reported.
Compare suppliers against the same technical specification and commercial basis. A low unit price may exclude required documentation, inspection, packaging, or delivery terms. Differences in grade, dimensions, tolerances, quantity basis, and inspection scope can make quoted prices difficult to compare.
For an international supplier, clarify Incoterms, packaging, shipment documents, export arrangements, lead time, and responsibility for freight and insurance. Define how substitutions, partial shipments, and delivery delays will be handled. These terms belong in the commercial agreement, not only in informal correspondence.
Request evidence relevant to the project, such as traceable material records, quality-system information, experience with the required product form, and a clear nonconformance process. Project references can be useful when available, but should be relevant to the application and shared with permission.
Use this checklist to make your inquiry clear and easier to quote:
1. Describe the service: Medium, concentration, temperature range, pressure, and relevant operating or cleaning conditions.
2. Specify the standard: ASTM B862 edition required by the contract, design basis, or end user.
3. Identify the material: Exact grade and any required UNS designation.
4. Define the product: Welded pipe, dimensional basis, outside diameter, wall thickness, length, quantity, and tolerances.
5. State manufacturing and weld requirements: Parent-material traceability, splice permission, seam details, and any specified post-weld requirements.
6. Set inspection requirements: Tests, examination extent, acceptance criteria, and any hold or witness points.
7. List required documents: Certificates, material and test reports, identification, and inspection records.
8. Specify condition and packing: Surface, internal cleanliness, end preparation, protection, marking, and export packing.
9. Confirm commercial terms: Delivery schedule, Incoterms, shipment documents, and approval process for substitutions.
A well-defined RFQ helps suppliers quote the same product and gives your technical and quality teams a clear basis for review.
ASTM B862 covers welded titanium and titanium-alloy pipe intended for general corrosion-resisting and elevated-temperature service. The applicable edition and grade should be stated in the purchase documents. [astm]
The number depends on the edition. ASTM B862-23 lists 33 grades; purchasers should verify the grade table in the edition required by their project rather than assuming the count is fixed for every revision. [astm] [astm]
The designation identifies welded pipe but does not, by itself, promise a particular welding method, shielding arrangement, consumables, or post-weld treatment. State the requirements that apply to the order in the purchase documents. [astm]
No. NPS is a dimensional designation and is not necessarily the actual outside diameter in inches. Specify the dimensional basis and confirm actual dimensions against the project requirements. [astm]
No. The inspection scope depends on the applicable edition, grade, size, condition, and order requirements. Define required tests, examination extent, and acceptance criteria in the purchase order.
At minimum, identify the required edition and grade, product form, dimensional basis, size, quantity, tolerances, inspection and documentation requirements, condition, packaging, and delivery terms.
ASTM B862 is an important starting point, but a reliable titanium welded pipe purchase depends on a complete, edition-specific order specification. Define the grade and dimensions, clarify weld and traceability requirements, agree on inspection and acceptance criteria, and specify packaging and records. For a quotation based on your drawings and service conditions, contact Shannxi Lasting New Material (Lasting Advanced Titanium) Industry Co., Ltd. with your required ASTM edition, grade, dimensions, quantity, and inspection needs.
1. [ASTM International — B862 Standard Specification for Titanium and Titanium Alloy Welded Pipe]
2. [ASTM International — B862-23 listing in the Titanium Subcommittee jurisdiction]
3. [ASTM International — B861 Standard Specification for Titanium and Titanium Alloy Seamless Pipe]
