API 6A Spools

Spools as per API 6A latest edition

• Casing Head Spools, Tubing Head Spools, Cross-over Spools, Adapter Spools, Spacer Spools, Drilling Spools

Specifications

• Sizes: Typically range from 1-13/16″ to 21-1/4″ .
• Pressure Ratings: 2,000 psi to 20,000 psi (common classes: 2K, 3K, 5K, 10K, 15K, 20K).
• Material Classes: AA to HH (covering general service to severe sour service with H2S resistance, per NACE MR0175).
• Product Specification Levels (PSL): PSL 1 to PSL 3.
• Performance Requirements (PR): PR1
• Temperature Ratings: -46°C to 121°C (L to U classes).
• Connections: API 6A flanged (Type 6B or 6BX), API 16A clamp hubs, or other (e.g., studded, threaded).
• Materials: Often forged AISI 4130 alloy steel or 410 stainless steel, with options for corrosion-resistant alloys (e.g., Inconel overlays).

Spools are manufacture in compliance API 6A,