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1) weco pup joints have four different types: pressure seal, non-pressure seal, integral type and welding type.
2) We can provide 1"~4" and 1000psi to 15000psi(7MPa to 105MPa) straight pipes. 1m,1.5m,2m,2.5m,2.8m long integral straight pipes are available. We also provide HP straight pipes with other sizes and pressure ratings as per customers' requirements.
3) The model of Pressure Seal Type: FIG402 union ,FIG602 union ,FIG1002 union ,FIG1502 union ;rated:4000psi(28MPa)~15000psi(105MPa).
4) The model of Non-pressure Seal Type: FIG206 union, FIG602 union,FIG1002 union,FIG1502 union;rated: 2000psi(14MPa)~15000psi(105MPa).
5) The model of Conventional Integral Type: FIG602 union,FIG1002 union,FIG1502 union;rated: 6000psi(42MPa)-15000psi(105MPa).
6) The model of Integral Type for H2S environment: FIG602 union,FIG1002 union,FIG1502 union;rated: 5000psi(35MPa)-10000psi(70MPa).
7) The model of Welded Union Type: FIG402 union,Tr union in metric,FIG602 union,FIG1002 union,FIG1502 union;rated: 4000psi(28MPa)-15000psi(105MPa).
8) The model of Welded Flange Type ; 21/16″flange,29/16″flange,31/8″flange,41/16″flange,31/16″flange;rated: 3000psi(21MPa)-15000psi(105MPa).
| Comparison | Straight Pipe | Pup Joint |
| Definition | Standard length pipe used for drill pipe, casing, tubing, or flowline | Short pipe used to adjust total length of string or connect tools |
| Common Length | R1: 6-7 m, R2: 8-10 m, R3: 11-13 m | 2-12 ft (0.6-3.6 m), customizable |
| Diameter Range | 2 3/8" ~ 6 5/8" common | Same as corresponding straight pipe |
| Standard | API 5CT (casing/tubing), API 5DP (drill pipe) | API 5CT, API 5DP, API 7-1 (drill tool pup joint) |
| Material Grade | J55, K55, N80, P110 (casing/tubing); E75, G105, S135 (drill pipe) | Same as straight pipe, e.g., G105, S135, 4145H |
| Connection Type | API LTC, BTC, EUE, NC, IF, FH | Same as straight pipe (EUE, NC, IF, etc.) |
| Main Function | Main body of string, load-bearing and fluid transport | Auxiliary adjustment of length, transition connection |
| Application | Drilling, casing, oil & gas transport, flowline | Length compensation, wellhead installation, tool combination |
| Features | Long length, designed for main load bearing | Short and flexible, easy to install and adjust |
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