Casing & Tubing API CT-P110

7/26/2019 Casing & Tubing API CT-P110

1/6

1 / 5

API P110 / SM110XS

Material Data Sheet

General description

API P110 / SM110XS is a low alloy High Strength Carbon steel OCTG casing material suitable for

severe Sour Service applications. API P110 / SM110XS is a validated full fledge Sulfide Stress

Cracking (SSC) resistant material developed based on SMC110 manufacturing experience.

SSC failure mechanism is a form of Hydrogen embrittlement in combined presence of H2S, water and

tensile stresses. NSSMC pioneered the development of a 110 grade material able to resist specific sour

service applications in the early 90s,under SMC110 name.

Diameters: 2-3/8 to 16

Weights: as per API 5CT/ISO 11960

Reference document

Proprietary SM-110XS. TGP-3159 (latest revision)

API 5CT / ISO 11960

NACE MR0175 / ISO 15156-2API 5C1 / ISO 10405

NACE TM0177

Appl icable environment

API P110 / SM110XS is des igned to provide 110 SMYS physicals for cas ing appli cat ions ,

while remaining SSC resistant in Severe Sour service condition corresponding to region 3,

High H2S combined with low pH, as defined by NACE MR0175/ISO15156-2 (Fig 1).


2/6

2 / 5

Fig. 1 : Sour Service regions in the pH vs H2S diagram

* Note : Even though this low pH corner is considered non-sour as far as H2S is concerned, caution needs to be exercised, asHigh Strength materials may become susceptible to Environmental Cracking (EC) even with no or very limited H2S.

There is a fair amount of confusion in relation to the H 2S partial pressure limit applicable to 110 ksi sour

service material.

ISO 11960 in its 2011 revision recognizes the existence of C110 material. The actual application of this

ISO C110 material in terms of sour service is left up to the end user judgment through the following

statement ISO 11960 (2011 revision) paragraph 7.14.1

Quote

General guidance:

The purchaser should refer to ISO 15156-2 or ANSI-NACE MR0175/ISO 15156-2 for guidance on the

usage of grades C90, T95 and C110. Particular attention should be given to the application of grade

C110 in ISO 15156-2 or ANSI-NACE MR0175/ISO 15156-2 SSC regions 2 or 3, as this material is not

suitable for all sour (hydrogen sulfide containing) service applications.

NOTE: The SSC test is for quality control purposes and does not qualify the material for any specific

sour service application. It is the product users responsibility to ensure that the product is suitable for the

intended application.

Unquote

Referring to ISO 15156 / NACE MR0175, ISO specified C110 application is restricted to either Region 1

per fig 1, or to any H2S partial pressure as long as the material is exposed to temperature always

exceeding 65C (150F).

SM110XS is a validated full fledge Sulfide Stress Cracking (SSC) resistant material usable forcasing applications anywhere within Regions 1, 2 & 3 of ISO 15156-2 pH versus H2S partial

pressure diagram, that is any combination of ppH2S and temperature under in situ pH occurring

in production environments.


3/6

3 / 5

Manufacturing

Process Description

Steel making Ladle refined, fully killed and vacuum degassed; continuously cast to afine grained practice

Pipe making Seamless

Heat treatment Quenched and Tempered

Specified mechanical properties

Yield strength

ksi

Min Max

Tensile

strength

ksi

Min

Elongation

%

Min

Hardness

HRC

Max

Technical Note

110 125 115 API Formula 30.0 Application: Unlimited H2S

Tested: 85% SMYS, 1bar

H2S, NACE A, Sol-A

Physical and thermal properties

unit 25C 50C 100C 150C 200C 250C

Density Kg/m3 7750 7740 7730 7720 7700 7680

Young's modulus GPa 212 211 209 206 203 200

Poisson's Ratio - 0.30 0.30 0.30 0.30 0.29 0.29

Tensile st rength

de-rating%

100 96.3 94.3 95.2 95.2 95.2

Yield strength

de-rating%

100 95.8 93.8 92.3 88.2 86.8

Thermal Diffusivity x10-6 m2/s 11.9 11.9 11.5 11.0 10.3 9.74

Heat Capacityx106 J/m 3 3.49 3.61 3.72 3.83 3.97 4.17

Thermal Conductivity W/m deg.C 41.5 42.9 42.8 42.1 40.9 40.6

Specific Heat J/Kg deg.C 450 466 481 496 516 543

Thermal expansion x10-6 / deg.C - 12.5 12.3 12.4 12.6 12.8


4/6

4 / 5

Technical information

Temperature increase tends to minimize materials SSC susceptibility, and this tendency can be

observed on API grades as well where, according to NACE MR0175 / ISO 15156-2, at higher

temperature exposures high strength materials can be used in Region 3 of NACE MR0175/ISO15156-2

pH-H2S domain diagram (please refer to Fig 1).

Referring to API P110 grade in particular, this material can be used in high H2S environments if and only

if the material is exposed to temperatures exceeding 80C / 175F (Fig. 2):

Fig. 2 : SSC Temperature thresholds for API Carbon steel grades according to NACE MR0175 /ISO 15156-2.


5/6

5 / 5

Fig. 3 : API P110 / SM110XS SSC resistance versus H2S pressure and temperature- 4 point bent beam test at 90% AYS,

- H2S partial pressure from 10 to 100 bars,

- Test temperature from 24 to 107C

- Test solution: 5% NaCl

- Test duration from 720 hrs to 2160 hrs

- pH values from 3.0 to 3.50

The above test verified API P110 / SM110XS SSC resistance as a function of temperature and H2S

partial pressure. These conditions were selected to maximize the H2S partial pressure within the gas

phase known to be the most severe in terms of SSC.

Storage and handling procedure

Health, Safety and Environment

While state-of-the-art HSE rules are applied throughout manufacturing process, proprietary and specific

HSE regulations shall be applied along the life cycle of the pipe until it reaches its final position in the

well, according to each operators rules. This particularly applies to all phases of handling and

transportation, assembly on the rig floor, and rig return if applicable. OCTG are heavy and by nature

unstable. Special care shall be paid to potential risks of injury whenever handling OCTGs. Walking on

pipes shall be avoided at all times. Usage of Personal Protection Equipments (PPE) is mandatory.

Equipment and procedures will be established to capture the possible wastes generated during

maintenance (cleaning, coating, doping) and disposed according to local regulations. This applies in

particular to storage dope, running dope, or cleaning water wastes.

Best practices for transportation, handling and storage of OCTG in general are covered by ISO 10405 /API RP5C1. In addition to these general rules, specific care is recommended pertaining to SMC110,because improper handling could affect the material performances and by extension the corrosionresistance :

Prevention of Spot Hardening

MDS refer to SM110XS -NSSMC
http://www.tubular.nssmc.com/download-area/download/39-special-handling-best-practices-for-sumitomo-s-high-alloy-materials-with-vam-connectionhttp://www.tubular.nssmc.com/download-area/download/39-special-handling-best-practices-for-sumitomo-s-high-alloy-materials-with-vam-connection


6/6

6 / 5

Casing & Tubing API CT-P110

Documents

Transcript of Casing & Tubing API CT-P110