AmTex Processing

I. Receiving Materials

All materials and material certifications are immediately inspected and approved by AmTex managers and Quality Assurance (QA) to ensure compliance to API and customer specifications. The QA department then creates a Heat number (traceability #), which is an internal tracking number that corresponds with the MP (Material Process) number assigned by the Sales department.

II. Sawing

Once the MP work order has been checked, and prior to any cutting, a stencil is made and stenciled onto the pipe, with our Heat number. From there the first cut is made and the first article inspected for length, squareness of cut, outside diameter (O.D.) wall thickness, ovality, and heat number. If all is correct, the blanks are sent on to the next process.

III. Internal Threading & Inspection

After changing the machine to meet the criteria for the coupling size and type (casing, tubing), the threading process begins with the first article inspection as certified inspectors rotate from one lathe to the next inspecting the couplings as they are produced.

IV. Wet Magnetic Particle Inspection

All couplings are then Examined/Inspected, per API specifications, using a black light under darkened conditions to evaluate indications by trained personnel. In this process all aspects of the process are controlled, measured and calibrated constantly. Finished couplings are free from any cracks, seams, and/or porosity.

V. Die Stamping/Stencil

Immediately after, the blanks are sent over to be die stamped/stenciled. This process labels our couplings with the AmTex name/logo, API logo, date of manufacture, and symbol for grade. Inspectors once again check to assure correctness. Any coupling that does not meet API certifications does not receive the API logo.

VI. Phosphating

The next step is the process of Phosphating. The couplings are cleaned, rinsed, Phosphated (manganese or zinc), cleaned again, and oiled. The first article is inspected to ensure API and the customer's requirements have been met.

VII. Painting (color/grade table)

Couplings are painted per API standards.

VIII. Final Inspection & Packaging

The final inspection has many aspects to it. The cleanliness, evenness of the phosphating or electroplating is the first to be examined. The heat number is once again checked and must match up with our paperwork and the original MP number. If deemed ok, the inspector then examines the quality of the exterior paint on the couplings. Next the correctness and legibility of the die stamp and/or paint stencil markings on the product are checked. After examining the quality of the product and the correctness/legibility of the paint stencil markings on the packaging flap, the QA department logs the process for internal records.

IX. Shipping / Storage

Lastly the couplings are shrink-wrapped / boxed and stored until the assigned ship date.


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