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Coupling 7″ 35# 25CRW-125 VAM TOP HT

The 7″ 35# 25CRW-125 VAM TOP HT coupling pairs the superior corrosion resistance of cold-worked super duplex stainless steel with the high-torque, gas-tight performance of the VAM TOP HT connection. Engineered for high-chloride, mildly sour, and seawater environments, this coupling offers outstanding protection against pitting and ensures long-term integrity in critical water injection and offshore wells.

Available Quantity

56

Unit

Condition

Unused

Mill Year

2005

Manufacturer

Sumitomo

Location

Texas, USA

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What is PipeFacts?

Field Inspection

Completed!

Receiving Inspection

Completed!

Final Inspection

In Progress

Certified Report

Not Started

Receiving Inspection Complete!

During this phase of PipeFacts™, material is received into one of our regional storage and inspection hubs, and we put material through a more detailed inspection. Our teams of inspectors inspects the pipe body for traceability and potential body defects and inspects the threads while a quality team in the office evaluates the as produced specification of the material test reports (MTRs).

What is

Receiving Inspection

?

100%
  • Visual Body Inspection (VBI)
  • Tally
  • Traceability to MTRs
5%
  • Visual Thread Inspection
  • Drift

Size

Nominal OD

7

in.

Nominal ID

6.004

in

Nominal Wall Thickness

0.498

in

Drift

5.879

in

Special Drift

—

in

Strength

Minimum Yield Strength

125

KSI

Minimum Ultimate Tensile Strength

135

KSI

Collapse Pressure

14,320

PSI

Internal / Burst Pressure

15,560

PSI

Disclaimer: The burst and collapse figures displayed are based on the API dimension tolerance of 87.5% of nominal wall thickness. Note that martensitic, duplex, super duplex, and nickel alloys often have tighter dimensional tolerances, therefore, increased strength ratings. The properties do not factor connection performance ratings. If your application requires more information ratings, please contact our technical services team, and we happily assist you.

Alloy

25CRW

Family

Duplex Stainless

Corrosion Resistance Level

Moderate

Alloy Description

Super Duplex 25 Chrome alloys, including 25CRW and 25CRS, are cold-hardened duplex stainless steels designed for corrosion resistance in sweet (CO2) and moderately sour (H2S) environments with high chloride concentrations, providing high strength up to 450°F.

The “Super” designation signifies a Pitting Resistance Equivalent Number (PREN) of ≥40, offering enhanced protection against H2S and localized corrosion from high chloride levels and/or oxygen, compared to standard 25 Chrome. As a result, these alloys are commonly used in tubing and liners for seawater and water injection wells. However, it is important to evaluate all relevant environmental factors, including H2S, CO2, temperature, pH, and chloride concentration, before finalizing material selection.

These alloys are classified under MR0175/ISO15156 as duplex stainless steels with a Pitting Resistance Equivalent Number (PREN) ≥40, suitable for environments with H2S partial pressures up to 3.0 psi.

Elemental Composition

C
6
Carbon
0.03%
N
7
Nitrogen
0.24%‒0.32%
Si
14
Silicon
0.8%
P
15
Phosphorus
0.03%
S
16
Sulfur
0.02%
Cr
24
Chromium
24%‒26%
Mn
25
Manganese
1%
Fe
26
Iron
57%‒65.56%
Ni
28
Nickel
6%‒8%
Cu
29
Copper
0.2%‒0.8%
Mo
42
Molybdenum
2.5%‒3.5%
W
74
Tungsten
1.5%‒2.5%

Name

VAM TOP HT

Licensee

VAM

Category

Premium

Thread Type

Threaded & Coupled

Description

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