International references for ASTM A105N Carbon Steel Flanges. Select the required specification system, then complete your enquiry. Options are available for technical review; compliance and supply capability require written confirmation.
1 · Choose reference standards
Selecting several references requests a compliance review. It does not establish equivalence or dual certification. Hidden selections remain in your enquiry.
0 reference groups selected
2 · Complete buying details
Keep these distinctions clear
Class, PN and JIS K are separate rating systems; no automatic conversion or drilling compatibility is implied. NPS / DN is nominal, not actual OD. Similar grades are comparison candidates only. ASTM / ASME and EN designations are not automatic substitutes.
Certificates, inspection, IBR and project approvals are separate requirements. An ISO 9001 quality-system certificate is not a product approval. Current issuer editions may differ from the edition required by your contract.
3 · Review and share enquiry
STEEL GEMS — INTERNATIONAL SPECIFICATION ENQUIRY
Product: ASTM A105N Carbon Steel Flanges
Requested references: To confirm
Exact grade / UNS / delivery condition: Normalized Carbon Steel A105N
Required edition / addenda: To confirm
Size, actual OD, wall / schedule and units: To confirm
Rating system and value (Class / PN / JIS K / Table): To confirm
Type, construction, connection, facing / thread: To confirm
Quantity with unit: To confirm
Documents / tests requested: To confirm
Delivery city / country / ZIP / port: To confirm
Project notes / origin restrictions / service conditions: To confirm
Please review applicable scope, compatibility, material origin, manufacturing route, compliance, availability and commercial terms. This is an enquiry, not an engineering approval.
Steel Gems · Mumbai, India. Share your project requirement so we can review sourcing or manufacturing feasibility and prepare the offered scope for your US destination.
NPS in inches, flange type, class, facing and dimensional standard / edition. State the mating connection.
Bore & finish
Matching pipe schedule or actual bore, weld-end details and required facing finish. Provide a drawing for nonstandard dimensions.
Material form
ASTM A105N / ASME B16.5 and B16.47. State forging, heat-treatment condition, marking and any approved-manufacturer restrictions.
Joint accessories
Confirm whether gaskets, studs and nuts are included; specify their material, dimensions and coating separately.
Inspection & traceability
Request heat / batch traceability with the ordered grade and product specification.
State MTC type and any PMI, chemical / mechanical tests, NDT or third-party witnessing.
Agree the inspection plan, acceptance criteria and document list before order placement.
Request manufacturer, raw-material source and finished-product origin records where required.
Certification, testing and inspection availability depend on the product and agreed order. The catalogue illustration is not evidence of current stock or a specific manufactured item.
Use US units without losing precision
Specify NPS in inches and state the dimensional standard. For actual dimensions, include units: in / mm, ft / m or lb / kg. Nominal pipe size is not a direct measurement of OD.
Define piece length, total length, quantity and billing basis. For example, a standard or random length must be confirmed in the offer rather than assumed to be 20 feet or 6 metres.
State any non-China, domestic-origin or approved-source restriction before quoting. Indian manufacture and non-China raw-material origin are separate requirements; both need supporting records if specified.
Include the US city / ZIP or port, requested delivery date, currency and Incoterms rule with its named place. Confirm protection, packing, freight, insurance and importer responsibilities in writing.
The importer / customs broker must confirm HTS classification, origin, applicable trade-remedy scope and duties. This page does not promise duty-free entry, approved-vendor status or compliance with a buyer-specific origin restriction.
Example enquiry — adapt to your approved specification
12 pieces, NPS 2 weld-neck RF flange, Class 150, ASTM A105N / ASME B16.5 and B16.47, bore to the specified pipe wall; facing finish and standard edition as ordered; MTC 3.1; US delivery location and date to confirm.
GRADE-SPECIFIC BUYING DESK
A105N normalised carbon steel: order the complete specification.
The N indicates requested normalised condition; evidence should be included in the material documentation.
Confirm normalising records, marking and project-specific supplementary requirements.
Form entries stay in this page until you choose to share or download them; they are not saved automatically. Include gasket, stud, nut and coating specifications separately if required.
AVAILABLE RANGE
Sizes and supply range
NPS 1/2 to 24 inch under ASME B16.5
Larger sizes under ASME B16.47
Classes 150, 300, 600, 900, 1500 and 2500
RF, RTJ and FF facing as applicable
PRODUCT FORMS
Types supplied
Weld-neck flanges
Slip-on flanges
Blind flanges
Socket-weld, threaded and lap-joint flanges
INDUSTRIES
Typical applications
Oil and gas piping
Refineries
Pressure vessels
Power and process plants
QUALITY CONTROL
Inspection and documentation
EN 10204 3.1 MTC
Ultrasonic and mechanical testing when specified
NABL verification
Dimensional, facing and marking inspection
TECHNICAL SUPPLY NOTE
ASTM A105N Carbon Steel Flanges from Steel Gems
Steel Gems supplies ASTM A105N Carbon Steel Flanges for industrial maintenance, projects and export requirements. Every offer is reviewed against the stated material grade, dimensional standard, size, schedule or pressure class, quantity, testing scope and delivery requirement.
For a technically complete quotation, send the product description, applicable specification, size, thickness or schedule, end connection, quantity, required MTC, inspection agency and delivery location.
Steel Gems supports material certification, heat-number traceability, NABL laboratory testing, NDT and third-party inspection for ASTM A105N Carbon Steel Flanges when required by the purchase specification.
