A Texas Flange resource. Mon to Fri, 8 AM to 5 PM CST.281-484-8325 · sales@texasflange.com

Chrome Steel Flanges is the chrome-moly desk of Texas Flange & Fittings Inc., a Houston flange supplier machining industrial pipe flanges since 1986.

Texas Flange supplies ASME and non-code industrial pipe flanges for the petrochemical, process and waterworks industries, in sizes from 1/2 inch through 203 inches and across pressure classes from 75 up through API 20K. Material test reports are available on every grade we ship.

Chrome-moly is where flange supply stops being a catalog exercise. The grades from F1 through F91 exist because the service is hot, or full of hydrogen, or full of sulfur, and often all three. Refinery hydroprocessing, catalytic reforming, power boiler and main steam piping. These are the places where a flange failure is not a housekeeping problem.

What matters on this work is not just pulling the right grade. It is the chemistry restrictions that hydroprocessing specifications impose, the heat treatment condition and class, the hardness limits, and the preheat and post weld heat treatment the grade demands during fabrication. Chrome-moly punishes shortcuts, and it punishes them years later rather than at hydrotest.

We hold that discipline, we document it, and we say plainly when a specification is asking for something the grade will not deliver.

Machined F5 chrome-moly studding outlet forging stamped F5 P/N 067271, showing the hub and drilled bolt circle

What we do

The full grade range

A182 F1, F5, F5a, F9, F91, F11, F12, F21 and F22, in the classes the standard defines.

Restricted chemistry

J-factor and X-bar controlled material for hydroprocessing service, with step cooling where specified.

Heat treatment control

Normalized and tempered or quenched and tempered as the class requires, with certified condition.

Hardness and NACE

Hardness limits held and reported, including sour service requirements per NACE MR0175 and ISO 15156.

Large diameter and custom

B16.47 Series A and B patterns, long weld necks, studding outlets, and print work through 203 inches.

Certification

MTRs on all grades, with specification revision, impact testing and third party witness where required.

The numbers

Supplying flanges since1986
Size range1/2 inch through 203 inches
Pressure classes75, 125, 150, 175, 250, 300, 350, 400, 600, 900, 1500, 2500, and 5K, 10K, 15K, 20K
StandardsASME, ANSI, API, AWWA, MSS, DIN and JIS, plus non-code and custom
CertificationMaterial test reports available on all grades
LocationHouston, Texas, USA

Product lines we carry

  • ANSI and ASME forged flanges
  • MSS SP-44 and ASME B16.47 Series A flanges
  • API Type 6A ring type joint face flanges
  • API 605 and ASME B16.47 Series B flanges
  • ASME boiler code flanges
  • Class 125 lightweight flanges for low pressure service
  • Plate flanges from 1/4 inch through 8 inch thick, including AWWA C-207
  • ANSI long weld necks and special body connectors
  • Studding outlets, also called pad flanges, flat bottom or radiused to fit
  • Spectacle blinds, line blinds and paddle spacers
  • DIN and JIS flanges
  • Special ring flanges and orifice unions

We also supply stainless and alloy plate flame cutting, and galvanized carbon steel flanges. Some grades of steel are not stocked by any flange producer but are occasionally required. We source those and make them to your requirements.

For the full catalog, see Texas Flange.

Talk to the chrome-moly flanges desk

Send the print, or send the size, class and grade. Texas Flange quotes quickly.

Request a Quote

Or call 281-484-8325 and ask for the chrome steel flanges desk.