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| TEJAS TUBULAR PROCESSING a. - Product Entry/Raw Material Even with only the very best seamless steel purchased, Tejas Tubular's qualified QC Specialists evaluate and inspect products received to ensure total compliance to standards and specifications before processing. Tejas Tubular processes only high-quality material that meets metallurgical and mechanical requirements imposed by the company's stringent internal specifications and customer standards. Product Supplied by Customer Before processing, customer materials are verified against industry standards and approved by the Quality Assurance Department. Only then will the product be accepted for processing. Traceability Tejas Tubular's Traceability Database tracks each steel heat from receiving to the end product. This traceability system ensures finished product identification and monitors product field performance. b. - Forging / Upsetter  In order to augment wall thickness for threading purposes the tubular product requirements to be upsetted. After being cut to length, tube ends are heated by a natural gas-fired slot furnace and then fed into the throat of a single toggle press of Tejas Tubular's AJAX upsetter where the hot end is gripped and forged by a die and punch set.After being upset, tubing is ejected and left to cool to ambient temperature. The Tejas Tubular upsetters have been designed to ensure the geometry of the upset and in such way that minimizes stress in the material.  The upset tubular product is then heat treated to customer specifications and industry standards, straightened, and inspected (Visual & Dimension, Drift, Special End Area, and NDT 5500 EMI: longitudinal, transverse, wall thickness and grade comparison full body Inspection). Tejas Tubular can forge tubing and drill pipe upsets in accordance with API specifications and any other standards. Special upsets for premium and integral connections can also be forged on request.Technical Characteristics Upsetting Force 1200 Metric Tons, Upsetting stroke: 18"; Pipe OD: 1" to 5"; API, Extended and Premium upset can be processed on request. c. - Heat Treatment Austenitizing / Annealing Furnace Preheating: Two Stage Induction Heaters (1000KW each) preheat the pipes before Tejas Tubular's 90' gas fired austenitizing furnace slowly heats the tubular products in four stages to a temperature above the transformation range.  After reaching the required temperature and maintaining it just long enough to heat the entire tube evenly throughout, the tubular product is then allowed to cool at a rate slow enough to prevent any hardening.The required temperature for this process should be slightly above the critical point, which varies for different steel compositions and grades. Low-carbon steel should be annealed at about 1650 degrees F, and high-carbon steel at between 1400 and 1500 degrees F. The purpose of annealing is not only to soften steel for machining, but to remove all strains of the upsetting or production process of the pipe itself. Tejas Tubular Processors furnace, with its electronically controlled temperature and transfer speed technology, is taking all necessary steps not to heat the steel much above the decalescence or hardening point as this would increase the coarseness of the grain in the steel structure. Technical Characteristics Preheating: Two Stage Induction Heater 1000KW each Austenitizing Furnace: Eclipse Length: 90' Gas fired Max Temperature: 1900 F Stages: Four Burner Type: Eclipse Temperature: Watlow OD Product Range:1" to 5-1/2";  Water QuenchSteel hardens when the austenite transforms to martensite as the steel is quenched, passing fairly rapidly through the critical temperature range of about 1500 to 1000 degrees F from the austenitizing temperature. The rapid heat removal during Tejas Tubular nine hundred gallon water per minute quench system consisting of 240 nozzles in 12 rows - causes carbon atoms to become trapped in highly-stressed positions among other atoms of the steel structure, which will give the pipe its hardness and strength for the required grade of the tubular product. The chemical composition of the pipe determines the upperand lower limits of this critical temperature range and the vital quench rate required through this range. Technical Characteristics – Quench Pumps: GPM Paco Quench ring: 900 gallon per minute Consisting of 240 nozzles (12 rows 20 nozzles each) Controlled spray technique for spray inside nozzle OD Product Range: 7-5/8"  TemperUpon completion of hardening, the as-quenched tubular product is highly stressed and brittle and transported on rotating lines to Tejas Tubular Gas fired walking beam Temper furnace. There tempering will be performed when the pipe is air cooled to about 150 -125°F after the quench processes, as Tempering performed before the tube reaches "hand warm"; temperatures, brings a risk of cracking while cooling from the process, due to insufficient transformation to martensite. By renewed heating of the pipe to and holding it at an intermediate heat, the inter-atomic stresses in the martensite are partially relieved, and the tubular product becomes usable having improved toughness and ductility. The heat treated pipe is then cooled in still air on a rotating table before it reaches the cross roll straightener in Tejas Tubular's integrated process flow. Technical Characteristics – Temper Gas Fired Temper Furnace: Eclipse Max Pipe Length to be Processed: 42' OD Product Range: 7-5/8" Temperature Range: 0-1500 Temperature Control: Watlow Integrated Rotating Cooling Table d. - Cross Roll Straightener After Heat treatment all pipes are visually inspected for deviation from straight or chord height to comply with API specification and straightened with Tejas Tubular Processors cross roll straightener if necessary. e. - Plain End Hydrotester  To comply with API testing requirements and customer standards Tejas Tubular has designed its custom built Plain End Hydro Tester which can apply Test Pressure up to 15000 PSI for Hydrostatic tests. Pipe is fed into the equipment where appropriate test pressure is applied and held for a specified time inside the pipe body according to specifications. The pressure and time requirements are based on dimensions grade and thread profile or customer requirements. Technical Characteristics – Hydrotester Model: Triple Head – Plain End or T & C OD Product Range: 5-1/2" Max Pressure: 15000 Psi f. - Double End Threading Line Tejas Tubular Processor uses its state of the art double-end threading line, utilizing the newest high production output CNC threading equipment in an automated production process. These threaded connections with meticulous precision ensure adequate volume and premium Quality in a wide range of box or pin threads - including BHG and USS Improved Buttress. High quality threading inserts are inspected by Tejas's Quality Department prior to use in the threading process which guarantees thread accuracy and sealing performance of each connection manufactured at Tejas Tubular - and sure, we are proud of it. After the threading process and thread inspection is performed on each tubular product, as required in API 5 CT or Customer Standards. Technical Characteristics – Double End T.L. CNC: TL3, TL4, 2002 Modell – High Prod. Output Double End Production OD Product Range: 1.125" to 5" Coupling Make-Up & Thread Protection To comply with API Specifications and customer requirements, a high grade thread compound is applied to the full surface of the dry and clean thread on either joint or coupling before the coupling is applied power tight with Tejas Tubular precision torque BUCKLE Machine. Full Length Drift Test Each tubular product processed by Tejas Tubular is drift tested according to API Specification throughout its entire length in a designated inspection area. High density polyethylene or plastic with a metal insert are applied wrench tight to avoid loosening during transport. Marking & Coating The pipe is measured, weight and stenciled according to API Specifications and customer requirements. An external coating is applied to give Tejas Tubular products protection from rust while in transit. g. - CNC Shop  Tejas Tubular CNC Shop is licensed under API 5CT Specification - 7th Edition for the manufacturing of couplings for tubing, casing & line pipe, as well as drill stem subs, tool joints and starter rods.Utilization and special programming of Tejas Tubular's newest CNC equipment together with high Quality carbide tooling enable machining to be completed with the highest standards and requirements. Couplings produced under API 5CT and all other machined products like subsavers, starter rods and pup joints receive close in-plant quality inspection before, during and after processing.  Technical Characteristics5 High Speed Production Band Saws 9 CNC Machines – Current Models OD Product Range: Alberto OD Product Range Couplings: 3/4" to 13-3/8" Groups: 1 to 4 EUE, NUE, Threads: All API, other on request Sawing On Tejas Tubular high speed Production band saws premium seamless green tubes are cut precise to size, in order to be manufactured as couplings, pup joints or tool joints in different length and specifications.
Rough Machining The tubular products are then pre machined on Tejas Tubular CNC's to be prepared for batch heat treatment according to their grades or requirements Heat Treatment – Pup Joints EUE is upset at both ends while alloy grades N, L and P are quenched and tempered. This is followed by full body inspection. Batch Heat Treatment In Tejas Tubular Austenizing Gas fired furnace, the pre machined products are heat treated in batches according to their grades and specifications and each batch tested in Tejas Metallurgical Laboratory during the process, complying with standards and requirements. Finish Machining All API or other Standard threaded connections with total accuracy can be produced. Precision ground machining and high grade threading inserts are QC inspected prior to use in the manufacturing process. This attention to detail guarantees thread accuracy & sealing performance of each connection manufactured at Tejas Tubular. Quality control is vital, thread reliability in the string is critical and we at Tejas Tubular believe that accurate threading is essential and reliability in craftsmanship is fundamental. Tool Joints Tejas Tubular is licensed under API Spec 7 to manufacture Tool Joints and can produce API Standards and other specifications in any size, style and Grade as specified in the purchase order. Precision CNC Machining caters for stringent conforming of dimensions, right and left hand Connections and High Production Milling Machines are used for flats required by customer specifications. Tejas Tubular's Gun Drilling Equipment bores Precision ID's as from 0.3125" in a fast an accurate operation, generating a high quality Tool Joint exceeding customer specifications and requirements while accommodating the economical aspect of an affordable but reliable product.  Zinc Phosphate CoatingTejas Tubular chemical coating process is applied to the threaded connection of Tool Joints and Couplings. This special coating process gives the threaded area maximum protection against corrosion and galling. Paint, Packaging, Stamping & Stenciling In the final process, Tejas Premium Products are weighed and measured.  Pup Joints and couplings are stamped with identifying markings and color coded according to their grades. Production, specification and order-related markings are paint stenciled along the body of the joint or coupling and a temporary corrosion - resistant coating is applied to the outer surface of the products.Adequate elements for packing Tejas Tubular products are applied. If required, special preservation methods can be provided to conform to specific customer requirements.
Shipping The finished products shipped to the clients are controlled through different documents like: - Bill of Loading - Registry of Tubular Products - Quality & Warranty Certificate |
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© 2003 Tejas Tubular Products, Inc.
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Tejas Tubular Products, Inc.
8640 North Green River Drive • Houston, Texas 77028 713-631-0071 Phone • 800-469-7549 Toll Free • 713-631-0072 Fax Contact Webmaster here with website concerns. |