Shaffer type double ram bop

When sourcing a Shaffer Type Double Ram BOP (Blowout Preventer), you must prioritize the Working Pressure (WP) and Bore Size. Ensure the unit matches your wellhead requirements, typically ranging from 2,000 psi to 15,000 psi. Additionally, verify the Body Material; it should be forged or cast from high-strength alloy steel that meets API Spec 16A standards to ensure structural integrity under extreme pressure.

The most critical certification is API 16A (Specification for Drill-through Equipment). For sour gas environments, the equipment must comply with NACE MR0175/ISO 15156 to prevent sulfide stress cracking. Always request the Certificate of Compliance (CoC) and ensure the manufacturer is ISO 9001 certified to guarantee a standardized quality management system.

Focus on the Sealing Technology. The ram packers and top seals should be made of high-performance elastomers capable of withstanding temperatures from -20°F to 250°F (-29°C to 121°C). Inquire about the locking mechanism—manual or hydraulic (Poslock)—to ensure the rams remain closed during a power failure. A secondary sealing system for the piston rod is also a vital safety feature.

Look for a 'door-opening' design that allows for easy ram changes without removing the BOP from the stack. Ensure the supplier provides a comprehensive spare parts kit (including O-rings, seals, and ram rubbers). High-tier suppliers on Made-in-China.com often provide detailed O&M (Operation and Maintenance) manuals and technical support for field installation.

Always conduct a third-party inspection (TPI) such as SGS, BV, or Intertek before shipment. The inspection should include a hydrostatic pressure test (at 1.5x working pressure) and a drift test. Verify the unique serial numbers against the manufacturer's records and check the supplier's track record on Made-in-China.com for verified gold status.

Negotiate based on Total Cost of Ownership (TCO) rather than just the unit price. Request a bundled discount if purchasing the BOP along with an Accumulator Unit or Kill/Choke Manifolds. Aim for a payment structure like 30% deposit and 70% against the Bill of Lading (B/L) or via a Letter of Credit (L/C) to ensure financial security.

Due to the extreme weight and dimensions, ensure the product is packed in seaworthy steel-framed crates or heavy-duty wooden boxes treated per ISPM 15 standards. Use FOB (Free On Board) terms if you have a reliable freight forwarder, or CIF (Cost, Insurance, and Freight) if you want the supplier to handle the risk until the port of destination. Ensure marine insurance covers 110% of the cargo value.

Confirm the HS Code (typically 843143) to calculate accurate import duties. Be aware of anti-dumping duties or specific trade sanctions that may apply to steel products in your region. Ensure all Material Test Reports (MTRs) and Pressure Test Charts are included in the shipping documentation to avoid customs delays.