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OCTG 7″ 29# 25CRS 80 Vam 21 Cleanwell R3

Super Duplex 25 Chrome (25CRS) is a high-strength, cold-hardened duplex stainless steel that offers exceptional resistance to localized corrosion in chloride- and oxygen-rich environments, operates reliably up to 450°F, and is qualified for use in both sweet CO₂ and moderately sour H₂S conditions, making it ideal for demanding applications like carbon capture (CCS/CCUS), geothermal, saltwater, and water injection wells. VAM® 21TM is the latest generation of Threaded & Coupled (T&C) premium connection introducing an innovative and revolutionary design. Confidence thanks to ISO 13679 CAL-IV compliance within the full pipe body envelope extends the opportunities for your well designs. VAM® 21TM is the highest performing and most rel​iable VAM® connection to date with excellent gas tight sealing under combined loads, extreme compression resistance (100%) and innovative VAM® Effect with the VAM®​ Stabilizer™. Seal and shoulder functions are separated so that torque and compression have no affect on the sealing performance.​

Available Quantity

8,000

FT

Condition

Unused

Mill Year

Manufacturer

Location

Texas, USA

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

6.184

in

Nominal Wall Thickness

0.408

in

Drift

6.059

in

Special Drift

6.125

in

Strength

Minimum Yield Strength

80

KSI

Minimum Ultimate Tensile Strength

95

KSI


Collapse Pressure

7,030

PSI

Internal / Burst Pressure

8,160

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

25CRS

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
0.2%‒0.3%
Si
14
Silicon
1%
P
15
Phosphorus
0.03%
S
16
Sulfur
0.01%
Cr
24
Chromium
24%‒26%
Mn
25
Manganese
1%
Fe
26
Iron
57.63%‒65.8%
Ni
28
Nickel
6%‒8%
Cu
29
Copper
0.5%‒1%
Mo
42
Molybdenum
3%‒4%
W
74
Tungsten
0.5%‒1%

Name

VAM 21 Cleanwell

Licensee

VAM

Category

Premium

Thread Type

Threaded & Coupled

Description


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