Sizes Upsets Grades
Premium Tubing 1.315" - 5.000" CS, 533,503, PH6, PH4 ** J55NM, N80, L80, T95, P110, Q125 **
EUE/API Tubing 2.375"-4.500" EUE, Extended EUE J55, J55NM, N80NM, N80Q, L80, P110 **
Casing 4.500"-9.625" N\A N80NM, N80Q, L80, C95, P110, P110HC, Q125, S135 **
Mech. Tubing 2.375"-10.000" N\A N80, L80, P110 **
Drill Pipe 2.875"-5.500" EU, IU, IEU E75, X95, G105, S135 **
** Texas Steel Conversion also processes additional proprietary specifications

If you have any questions about any of these items please Contact Us.


     Forging services are offered on a wide range of tubular steels and sizes. Finishing and inspection equipment follow specifications as required for both API and premium upset requirements for tubes from 1.315" to 7.000" outside diameter. The following is a list of upsets and corresponding outside diameters available.

  • API EUE: 2.375" - 4.500" (standard and extended head)
  • PREMIUM INT. / EXT. UPSETS: 1.315" - 5.000" (CS, 533, 503, PH6, PH4, etc.)
  • DRILL PIPE: 2.375" - 5.500"
  • SPECIALITY UPSETTING: To your specifications

Heat Treating

     Our Heat Treating facilities offer full length normalizing or quench & tempering of tubing from 1.315" to 10.750" O.D. on a variety of furnace production lines. TSC can process tubing, drill pipe, mechanical tubing, casing, and bar stock. We are capable of processing tubing with lengths varying from API range 1 through range 3. All API and most proprietary grades are possible. Following heat-treating, the pipe is straightened on a cross-roll straightener or punch/gag press as required. The following is a list of available heat treatments and the corresponding available sizes.

  • Quench and Temper - 1.315" - 10"
  • Normalize, Temper, or Stress Relieve - 1.050" - 10.75"


     NDT inspections, including magnetic particle, ultrasonic and EMI, are utilized to verify product integrity throughout processing in accordance with specification requirements. After heat treatment, the mechanical properties of the pipe are tested to insure they comply with API specifications.


     TSC's quality laboratories are equipped to perform tensile testing to verify mechanical properties, Rockwell hardness tester to verify hardness levels and uniformity, multi-power microscope to verify microstructure, and charpy tester to verify impact strength. A state-of-the-art chemical analyzer is used to verify conformance to API requirements.

Threading & Machining

     Our skilled machinists use state-of-the-art Computer Numerically Controlled (CNC) lathes for threading tubing and casing from 1.660" to 9.625" OD. All material is inspected by certified inspectors to ensure the highest quality. The following is a list of some of the services available:

  • API Round Threads
  • API Buttress
  • Specialty Buttress
  • Beveling
  • Facing
  • Custom Threading

Drill Pipe

     TSC manufactures a wide range of API and proprietary drill pipe products ranging from 2-7/8" to 6-5/8" OD in range 2 or range 3 lengths. Manufacturing begins with the highest quality raw materials from leading tube and tool joint manufacturers whose products are produced to TSC's demanding specifications. Our specifications exceed those of API and allow for exceptional quality of the finished product. As a result, we are able to guarantee 95% minimum wall thickness on all drill pipe we produce. The processing of tubes and tool joints, as well as the welding, is performed in-house to strict manufacturing specifications and quality control. TSC incorporates strict engineering controls in the weld line processes to ensure the consistent quality of every joint.

     We produce drill pipe to all API grades (E-75, X-95, G-105, S-135) as well as numerous proprietary grades, which among others, include NS-1 and IRP sour service grades. In addition, TSC's own proprietary grades are available for service requirements exceeding those of API. These grades include TSC-140, TSC-95CY, TSC-G105CY and TSC-105SS and offer either higher strength or improved corrosion resistance beyond API products.

     TSC drill pipe is offered with API's full range of connections or with proprietary high torque connections. Two double-shoulder high torque connections are offered; the TSDS series and the SSDS series. These connections exceed the capabilities of API connections and are easy and quick to run as well as economical.

     We offer the following services: hard banding - offered with a selection of hard metal products, make and break services and internal plastic coating according to customer preferences.

If you are interested in acquiring drill pipe contact our drill pipe division, TSC DRILL PIPE, directly.

Standard API Tool Joint Dimensions and Grades for Drill Pipe
Tool Joint Designation Size and Style Nom. Wt. LB/FT Available Grades
NC31 2 7/8 EU 10.40 E75, X95, G105, S135
NC38 3 1/2 EU 9.50 E75
NC38 3 1/2 EU 13.30 E75, X95, G105, S135
NC38 3 1/2 EU 15.50 E75, X95, G105
NC38 (1) 3 1/2 EU 15.50 S135
NC40 4 IU 14.00 E75, X95, G105, S135
NC46 4 EU 14.00 E75, X95, G105, S135
NC46 4 1/2 IU 13.75 E75
NC46 4 1/2 IEU 16.60 E75, X95, G105, S135
NC46 4 1/2 IEU 20.00 E75, X95, G105, S135
NC50 4 1/2 EU 13.75 E75
NC50 4 1/2 EU 16.60 E75, X95, G105, S135
NC50 4 1/2 EU 20.00 E75, X95, G105, S135
NC50 5 IEU 19.50 E75, X95, G105, S135
NC50 5 IEU 25.60 E75, X95, G105
5 1/2 FH 5 IEU 19.50 E75, X95, G105, S135
5 1/2 FH 5 IEU 25.60 E75, X95, G105, S135
5 1/2 FH 5 1/2 IEU 21.90 E75, X95, G105, S135
5 1/2 FH 5 1/2 IEU 24.70 E75, X95, G105, S135
(1) While API recommends NC40 on this item, which TSC does offer, the typical industry requirement is for NC38.

Texas Steel Conversion is a global leader in the processing of oil country tubular goods(OCTG) and the manufacturing of drill pipe. Since 1976, TSC has been dedicated to growing and improving our capabilities to exceed our customers' ever growing requirements. As one of the world's largest commercial heat-treating companies, TSC has the resources and expertise to meet the most critical specifications. TSC is committed to meeting the highest levels of quality and service.

  • 3101 Holmes Rd
    Houston, TX 77051
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  • 7401 C.E. King Parkway
    Houston, TX 77044
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  • 1700 Independence Avenue
    Bryan, TX 77803
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     The American Petroleum Institute(API) issues the directives on which our Quality Program is designed. API establishes quality requirements for companies who wish to be a part of their program. An API product specification must be followed in order to put the API monogram on every conforming joint. The API monogram is a warranty to our customers that the pipe conforms to the API specifications to which it was processed.


     All of the specifications and procedures that everyone in the company works to are very formal and must be followed. All employees receive a special quality orientation to explain our extensive quality program. Each production worker receives Standard Operating Procedures from which they are trained to perform their job. After an on-the-job training period, each production worker receives a practical examination to ensure that the employee has been successfully trained and understands his or her responsibilities thoroughly.

Main Office

Hours: Monday - Friday 7:30 AM - 4:30 PM
Phone: (713) 733-6013


©2009 Texas Steel Conversion, Inc. All Rights Reserved.