Connection List
The connection list gives you access to the VAM® and NSMAXᵀᴹ product lines. Because not all products can be listed, such as fit-for-purpose or so-called isolated products, please contact Nippon Steel engineer in case the VAM® or NSMAXᵀᴹ connection you are looking for is not listed.
VAM TOP ® is globally recognized as setting the standard in reliability and performance, for threaded and coupled premium connections. The connection represents the output of 30 years of VAM® Research & Development activities and has a track record that stretches back over more than 15 years. The connection minimizes the risks that result from combined loads induced by: gas pressure, temperature, bending, compression.
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Applicable range
- VAM TOP is available from 2 3/8" to 16", including odd OD sizes
- All API weights, and beyond
- Standard, Alternative and Special Drifts
- Carbon steel, Martensitic, Duplex and Nickel base Alloy material
- Yield strengths from 80 ksi to 140 ksi in particular
Energized metal-to-metal seal
- A patented metal-to-metal seal system offers excellent gas-tight sealing, under even the most severe combined loads, as encountered in deviated or long horizontal wells.
- The seal integrity remains constant after repeated make-ups and break-outs.
- The seal geometry protects against galling.
Reverse Angle Torque Shoulder
- A reverse angle torque shoulder provides a positive torque stop which allows for accurate power-tight make-up and minimizes hoop stresses in the connection.
- The "wedge" effect caused by the reverse angle gives the connection superior structural strength.
- The shoulder design is optimized in order to resist adverse conditions such as combined compression and external pressure or combined bending, compression, and torque (see the corresponding gas-tight VME performance envelopes for tubing and casing sizes).
Improved hook thread design
- A modified hook thread profile with 3° reverse angle on the load flank, not only provides the connection with superior tension strength but also increases its resistance to compression.
- The excellent structural strength including increased bending and compression resistance, makes this connection especially suited for highly deviated and long horizontal wells.
- Optimized thread geometry minimizes the risk of galling, even when thread lubricants are poorly applied.
Coupling design
- The 100% efficient connection performance has been engineered through factors such as: the coverage of the vanishing threads, long internal shoulder, and coupling critical cross sections greater than those of the pipe body
Streamlined internal profile
- A pin ID chamfer, tight tolerances on the coupling center and a long shoulder combine to minimize turbulence and energy loss inside the connection for high-velocity gas flows.
Extensive testing to the limits
- The connection has been extensively tested through the whole range of diameters in accordance with the most stringent qualification procedures, including the latest ISO13679 standards.
Options
- Enhanced HP-HT qualified designs are available upon request, for the most extreme applications.
- VAM® TOP SC90 / VAM® TOP SC80 (special clearance): these extraclearance couplings offer 90% and 80% tensile efficiency respectively.
- GRE liner: the combination of a GRE liner with a standard VAM® TOP connection has been tested and fully validated.
- CLEANWELL® Zero: this option gives access to all the benefits coming from a dope-free solution: no storage dope, no running dope.
- VAM® TOP HT / VAM® TOP HC / VAM® TOP FE: Specific VAM® TOP designs are available for higher torque applications / higher compression applications / enhanced fatigue resistance. Please refer to the dedicated leaflets for details.
