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OCTG 7″ 29# 25CRS-80 VAM 21 R3

This 7″ 29# 25CRS-80 VAM 21 R3 casing is made from Super Duplex 25CRS alloy, a cold-hardened duplex stainless steel offering superior corrosion resistance in sweet (CO₂) and moderately sour (H₂S) environments with high chloride concentrations, suitable for service up to 450°F. With a PREN ≥40, this alloy delivers excellent protection against pitting and localized corrosion, making it ideal for demanding HPHT conditions and water injection wells. The VAM 21 connection ensures a high-performance, metal-to-metal seal, providing structural integrity and reliable pressure containment in downhole applications with high tensile strength and seal reliability.

Available Quantity

5,080

FT

Condition

Unused

Mill Year

Manufacturer

Salzgitter Mannesmann

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

6.184

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

Licensee

VAM

Category

Premium

Thread Type

Threaded & Coupled

Description

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