Import Astm B306 — Buy in wholesale FOB from Supplier in South Korea (Republic Of Korea)

ASTM B306 from East Jin International Co., Ltd. designates copper alloy tube manufactured to the ASTM B306 specification for drainage, waste, and vent (DWV) systems in building construction. The material is C12200 copper alloy containing 99.9% copper with 0.015-0.040% phosphorus added as a deoxidising agent during melting, which improves weldability and reduces porosity in brazed joints. This phosphorus-deoxidised grade differs from electrolytic tough pitch copper in its hydrogen resistance during thermal joining, making it preferred for plumbing applications where oxy-acetylene brazing is common practice. The tube is supplied in straight lengths rather than coil, as DWV installations require rigid, non-flexible lines with solvent-welded or soldered joints at predictable intervals.

ASTM B306 covers tube in nominal sizes from 1-1/4 inch to 12 inch diameter, with wall thickness designated by type K, L, M, or DWV weight schedules. Type DWV has the thinnest wall and lowest pressure rating of the four, appropriate for gravity drainage and vent stacks where no pressure head exists. The standard specifies clean, degreased interior surfaces to prevent biological film accumulation and maintain flow capacity. C12200 alloy in the annealed temper provides adequate formability for offset bends and closet bends without cracking, though excessive work hardening should be avoided. In construction markets, this specification competes with PVC and cast iron; copper DWV commands premium positioning in heritage restoration, fire-rated assemblies, and medical facilities where material melting point and smoke toxicity are regulated considerations.

General contractors, plumbing subcontractors, MEP engineering firms, and wholesale distributors serving the commercial construction sector represent the core buyer base. International demand concentrates in regions with active building code adoption of copper DWV, including parts of the Middle East, Southeast Asia, and certain European jurisdictions. East Jin International offers this product with ISO and CE certifications mentioned in source materials, though buyers should request current certificate copies and scope of accreditation. Packaging details and minimum order thresholds are not specified in available data and require direct supplier confirmation. The FOB and CIF shipping terms referenced should be negotiated with explicit port designation and responsibility matrix.

East Jin International Co., Ltd. is headquartered at Seomun Building, 32 Jandari-Ro in Seoul's Mapo-gu district, South Korea. The company holds imported tier status with harbor trust classification on this platform. Response metrics show 0.00% response rate with no recorded average response time, indicating that proactive follow-up will be necessary for any inquiry. The supplier address places it in a commercial district rather than an industrial zone, suggesting trading or distribution activity rather than primary manufacturing.

This listing presents ASTM B306 copper drainage tube as part of the company's construction sector portfolio, alongside other copper and metal products. The profile does not disclose year of establishment, number of employees, annual turnover, manufacturing facility location, or specific client references. Claims of ISO and CE certification appear in descriptive text but lack certificate numbers, accreditation bodies, or scope details that would allow independent verification. Buyers should treat these as unverified assertions until documentation is provided directly. The company's role as manufacturer, authorised distributor, or independent trader for this specific product line remains unspecified and should be clarified before contractual commitment.