ASTM B705 Alloy 825 Welded Pipe, Annealed Longitudinal Seam | N08825

ASTM B705 Alloy 825 Welded Pipe, Annealed Longitudinal Seam | N08825

Shaanxi Shangyou Stainless Steel Co., Ltd. supplies astm b705 alloy 825 welded pipe, annealed longitudinal seam | n08825 for buyers whose primary search intent is chemical and oil-and-gas welded piping, not generic stainless or nickel-alloy stock. The page should be quoted against the selected standard edition, the equipment or component drawing and the governing design code. Longitudinally welded Alloy 825 pipe to ASTM B705 for acid processing, oil-and-gas and corrosion-resistant transfer systems.

The material decision should start with service conditions. Ni-Fe-Cr-Mo-Cu-Ti alloy with purchasing focus on the automatic seam route, heat treatment, NDE and dimensional standard. Use seamless B423 product when a seam is prohibited; compare with Alloy 625 welded pipe when higher chloride resistance or strength is required. This comparison belongs in the enquiry stage because a higher alloy name does not automatically deliver the lowest life-cycle risk.

A complete RFQ needs product form, grade/UNS, ordered condition, dimensional basis, tolerances, quantity and inspection level. Specify NPS, schedule/nominal wall, length, ends, ovality, seam reinforcement, dimensional standard and design code. For pressure-containing products, the material standard controls product quality; it does not replace pressure-design calculations, corrosion allowance or code approval.

Manufacturing and documentation must remain connected. Automatic longitudinal welding without filler, followed by required cold work/annealing, sizing and seam inspection. The baseline verification plan is: MTC, seam-route record, hydrostatic or NDE, UT/RT/ET as ordered, PMI, dimensions and optional corrosion testing. Any supplementary requirement—PMI extent, UT class, eddy-current acceptance, corrosion testing, grain size, roughness, cleanliness or third-party inspection—must appear in the PO before production.

Fabrication guidance: Field welds require qualified nickel-alloy procedures. Control dilution, iron contamination, heat tint and interpass temperature. Selection boundary: B705 compliance does not establish sour-service acceptance or pressure rating. Confirm design code, environmental cracking requirements and corrosion allowance. Buyers should provide fluid composition, maximum and minimum temperature, pressure, design life, fabrication route and applicable code so the quotation can separate mandatory requirements from optional controls.

Standards, Dimensions and Supply Definition

Material and Selection Markers

Use note: Values above are concise identification/selection markers, not a replacement for the ordered ASTM/AWS chemistry table or the MTC.

Candidate Applications

· Sulfuric and phosphoric acid piping.

· Pickling systems.

· Oil-and-gas process lines.

· Chemical transfer headers.

Buyer Decision Boundary

Use seamless B423 product when a seam is prohibited; compare with Alloy 625 welded pipe when higher chloride resistance or strength is required.

Processing, Inspection and Documentation

· Manufacturing: Automatic longitudinal welding without filler, followed by required cold work/annealing, sizing and seam inspection.

· Fabrication: Field welds require qualified nickel-alloy procedures. Control dilution, iron contamination, heat tint and interpass temperature.

· Inspection: MTC, seam-route record, hydrostatic or NDE, UT/RT/ET as ordered, PMI, dimensions and optional corrosion testing.

· Traceability: Keep heat/lot identity through cutting, machining, bending, welding, testing and packing.

· Documentation: Confirm MTC type, test reports, packing list, country-of-origin statement and third-party inspection before production.

RFQ Checklist

· Standard and adopted edition: ASTM B705

· Grade / UNS: Alloy 825 / N08825

· Form and route: Longitudinally welded pipe

· Dimensions, tolerances, quantity and unit basis

· Delivery/heat-treatment condition and surface/end finish

· Design code, service fluid/atmosphere, pressure and temperature

· Inspection/NDE, acceptance criteria, MTC and third-party witness points

· Marking, preservation, packing and delivery destination

Inquiry CTA

Frequently Asked Questions

1. What does ASTM B705 cover for this product? Longitudinally welded Alloy 825 pipe to ASTM B705 for acid processing, oil-and-gas and corrosion-resistant transfer systems. Always purchase to the edition adopted by the contract or project specification.

2. Is this product seamless, welded, forged, rolled or drawn? The PO must state the required route exactly: Longitudinally welded pipe. Do not rely on a product photograph or a family name to establish the route.

3. How should buyers select Alloy 825? Ni-Fe-Cr-Mo-Cu-Ti alloy with purchasing focus on the automatic seam route, heat treatment, NDE and dimensional standard. Use seamless B423 product when a seam is prohibited; compare with Alloy 625 welded pipe when higher chloride resistance or strength is required.

4. Which dimensions must be included in the RFQ? Specify NPS, schedule/nominal wall, length, ends, ovality, seam reinforcement, dimensional standard and design code. Add quantity, unit basis, tolerances and any drawing-controlled geometry.

5. What heat-treatment or delivery condition is required? Annealed as required by the ordered standard and alloy condition. The MTC and heat-treatment records should use the same grade and condition language as the PO.

6. Which inspection documents can be requested? MTC, seam-route record, hydrostatic or NDE, UT/RT/ET as ordered, PMI, dimensions and optional corrosion testing. The final inspection scope must be agreed before order placement.

7. Is it suitable for the intended corrosive or high-temperature service? B705 compliance does not establish sour-service acceptance or pressure rating. Confirm design code, environmental cracking requirements and corrosion allowance. A material engineer should approve the final choice using actual service data.

8. What fabrication issues should be addressed? Field welds require qualified nickel-alloy procedures. Control dilution, iron contamination, heat tint and interpass temperature. Use a qualified procedure and preserve heat/lot traceability after cutting or fabrication.

9. What are typical applications? Common candidate applications include sulfuric and phosphoric acid piping, pickling systems, oil-and-gas process lines, chemical transfer headers. These examples are not blanket design approvals.

10. What information is needed for a firm quotation? Send standard and edition, grade/UNS, form, dimensions, condition, quantity, delivery destination, inspection/NDE, documentation, packing and any third-party inspection or code requirement.