Pipeline corrosion is the leading cause of integrity failures and unplanned shutdowns in the oil and gas industry. Both internal and external corrosion protection strategies are essential for long-service-life pipelines. External coating systems, including fusion-bonded epoxy (FBE), three-layer polyethylene (3LPE), and three-layer polypropylene (3LPP), form the first line of defense against soil-side corrosion in buried pipelines. Internal flow assurance coatings reduce friction and protect against sweet and sour corrosion in wet gas and produced water service. For sour service environments containing hydrogen sulfide, NACE MR0175/ISO 15156 compliance is mandatory, requiring sulphide stress cracking (SSC) resistant materials and controlled hardness. Global Steel Industries supplies sour service compliant pipes with appropriate material certifications Hydrostatic pressure testing of every pipe joint verifies pressure containment integrity. Dimensional inspection confirms wall thickness, outer diameter, ovality, and end geometry are within tolerance. Chemical composition verification by optical emission spectrometry or X-ray fluorescence ensures the steel meets specified grade requirements. Mechanical testing including tensile, yield, elongation, and Charpy V-notch impact testing confirms the pipe meets its specified minimum properties. Global Steel Industries provides complete documentation packages, including mill test certificates, third-party inspection reports, and certificates of conformance for every pipe shipment.