273 mm 13 Cr Casing 16# Thick Wall Alloy
13% Chromium seamless alloy steel casing, 273 mm OD, 16 lb/ft nominal with 13.2 mm wall thickness, corrosion-resistant for CO2 environments in gas wells. HTS 7304.29.4140 covers this seamless other alloy steel thick wall casing for drilling applications.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If classified as stainless steel
13Cr alloys often treated as stainless under 7304.29.10xx due to chromium content.
If having OD 114.3 mm to 215.8 mm
Narrower OD range uses sequential subheading 7304.29.4130.
If with integrated valve or tap
Pipes with valves/other appliances classify as tap/tube fittings in Chapter 84.
Not sure which classification is right?
Our AI classifier can analyze your specific product and recommend the correct HTS code with confidence.
Import Tips & Compliance
• 13Cr is martensitic stainless; verify if customs requires stainless steel treatment under 7304.29.10
• Corrosion test results (e.g
• NACE TM0177) essential for high-alloy grades in sour/CO2 service
• Mark pipes with grade, size, and manufacturer per API 5CT; faded markings cause inspection delays
Related Products under HTS 7304.29.41.40
API 5CT L80 Type 9 Casing Pipe 9-5/8 inch
Seamless alloy steel casing pipe conforming to API 5CT L80 Type 9 specifications, with an outside diameter of 244.5 mm (9-5/8 inches) and wall thickness of 15.7 mm, designed for oil and gas well drilling. It falls under HTS 7304.29.4140 due to its seamless construction from alloy steel, OD between 215.9-285.8 mm, and wall thickness of 12.7 mm or more for use as drilling casing.
13-3/8 inch P110 Casing Pipe Seamless Alloy Steel
High-strength seamless P110 grade alloy steel casing with 339.7 mm OD (13-3/8 inches, actually 13.375 inches standard) and 14.37 mm wall thickness for deep oil well applications. Classified under HTS 7304.29.4140 for its alloy steel composition, specified OD range, thick walls suited to withstand high-pressure drilling environments.
10-3/4 inch Q125 Casing Pipe 20.78# Alloy Steel
Premium Q125 grade seamless alloy steel casing, 273 mm OD (10-3/4 inches), 20.78 lb/ft with 16.66 mm wall thickness for ultra-high pressure oil and gas wells. HTS 7304.29.4140 applies to this thick-walled, mid-size OD seamless alloy casing used in drilling operations.
244.5 mm OD 15 CrMo Alloy Casing 14.5 mm Wall
Seamless 15CrMo alloy steel casing pipe with 244.5 mm outside diameter and 14.5 mm wall thickness, manufactured to API 5CT standards for intermediate casing strings in oil wells. Falls under HTS 7304.29.4140 as other alloy steel seamless casing exceeding 12.7 mm wall thickness in the specified OD range.
9-7/8 inch 43.50# L80 Casing API 5CT
API 5CT L80-13Cr seamless casing 9-7/8 inch (250.82 mm OD), 43.50 lb/ft with 17.45 mm wall thickness for intermediate/production casing in corrosive oilfield conditions. Fits HTS 7304.29.4140 specifications for alloy steel seamless thick wall casing.
9-5/8 inch T95 Casing 17.70 ppf Thick Wall
Seamless T95 alloy steel casing pipe, 244.5 mm OD (9-5/8 inches), 17.70 lb/ft weight corresponding to 15.88 mm wall thickness, for sour gas service in oil drilling. Meets HTS 7304.29.4140 criteria as other alloy steel seamless casing with thick walls in the 215.9-285.8 mm OD range.