Chapter 7304 — Customs Tariff Headings

7304.2Casing, tubing and drill pipe, of a kind used in drilling for oil or gas:

7304.3Other, of circular cross-section, of iron or non-alloy steel:

7304.4Other, of circular cross-section, of stainless steel:

7304.5Other, of circular cross-section, of other alloy steel:

7304.90.00Other

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Products classified under Tariff item 73.04

12-Inch OD 316L Stainless Steel Gas Pipeline Tube

Seamless 316L stainless steel tube with a 12-inch outer diameter, engineered for natural gas transmission lines in corrosive soil conditions. Its stainless steel composition and seamless construction provide superior resistance to pitting and crevice corrosion, making it suitable for pipeline service.

24-Inch OD 304H Stainless Steel Gas Transmission Pipe

Large diameter seamless 304H stainless steel pipe for high-temperature gas transmission pipelines. The heat-resistant grade maintains strength up to 1500°F, and its seamless construction ensures integrity in demanding pipeline environments.

321 Stainless Steel Stabilized Pipeline Tube

Seamless 321 stabilized stainless steel tube for welded oil and gas pipelines. The titanium addition prevents carbide precipitation, maintaining corrosion resistance in weld heat-affected zones, making it ideal for pipeline service.

3-inch OD 316L Stainless Steel Pipeline Connector

Seamless 316L stainless steel line pipe section, 76.2 mm OD, used as straight connectors in oil/gas flowlines. Its seamless stainless steel construction and pipeline service make it suitable for this tariff item.

4-Inch Schedule 160 304 Stainless Steel Line Pipe

Seamless 304 stainless steel line pipe, 4-inch diameter with Schedule 160 wall thickness for high-pressure oil gathering lines. Provides cost-effective corrosion resistance for general pipeline service, meeting the requirements of seamless stainless steel line pipe.

8-Inch 310 Stainless Steel High-Temperature Line Pipe

Seamless 310 stainless steel pipe for high-temperature oil processing pipelines up to 2000°F. Oxidation-resistant grade for refinery hot gas lines, combining stainless steel composition with seamless construction for pipeline integrity.

API 5LC Stainless Steel Oil Line Pipe 4.5-inch OD

Seamless API 5LC duplex stainless steel pipe, 114 mm OD, for crude oil gathering lines in oilfields. Its seamless stainless steel construction and pipeline application meet the requirements of this tariff item.

API 5LC Stainless Steel Sour Service Line Pipe

Seamless stainless steel pipe certified to API 5LC for sour service in oil and gas pipelines containing H2S. Features enhanced resistance to sulfide stress cracking, ensuring durability in corrosive environments.

API 5L X65 Stainless Steel Line Pipe

Seamless stainless steel pipe meeting API 5L X65 specifications, designed specifically for high-pressure oil and gas pipelines. Its seamless construction and stainless steel composition ensure corrosion resistance in harsh environments.

Duplex 2205 Seamless Gas Line Pipe 2-inch OD

UNS S32205 duplex stainless steel seamless pipe, 50.8 mm OD, for high-pressure gas transmission lines. Its seamless stainless steel construction and pipeline use make it eligible for this tariff item.

Duplex 2205 Stainless Steel Oil Pipeline Casing

Seamless duplex 2205 stainless steel pipe used as casing in oil production pipelines, offering high strength and chloride stress corrosion resistance. Designed for sour service environments with H2S exposure, meeting pipeline requirements.

N08825 Incoloy Stainless Alloy Line Pipe

Seamless N08825 Incoloy alloy pipe (UNS designation for nickel-iron-chromium stainless) for severely corrosive oil and gas pipelines. Excellent resistance to pitting and stress corrosion, suitable for demanding pipeline service.

Sch 40 Stainless Steel Line Pipe 2.375-inch OD

Schedule 40 seamless stainless steel pipe, 60.3 mm OD, wall thickness 3.91 mm, for oil gathering systems. Meets the criteria for seamless stainless steel line pipe for oil/gas pipelines with OD not exceeding 114.3 mm.

Seamless 304 Stainless Steel Gas Pipeline Tube 3.5-inch

Grade 304 seamless stainless steel tube with 88.9 mm OD for natural gas distribution pipelines. Meets the criteria as line pipe of stainless steel, seamless, OD not exceeding 114.3 mm, used for gas pipelines.

Super Duplex 2507 Stainless Steel Sour Gas Line Pipe

High-strength seamless super duplex 2507 stainless steel pipe for sour gas pipelines, with PREN >40 for extreme corrosion resistance. Used in high-pressure gathering lines from wells, combining strength and corrosion resistance.

12-Inch OD Seamless Oil Pipeline Tube

A 12-inch outer diameter seamless pipe of nonalloy steel, engineered for transporting crude oil in pipelines. Its seamless manufacture and designation as line pipe for oil/gas transmission align with tariff item 7304.19.00.

1.66-inch OD Seamless Iron Line Pipe for Shale Gas Lines

Small-diameter seamless iron pipe, 42.2 mm OD, for low-pressure shale gas gathering lines, qualifying as nonalloy under tariff item 7304.19.00 for its pipeline-specific design and size constraints. Lightweight option for remote locations.

16-Inch Seamless Carbon Steel Line Pipe

Heavy-duty 16-inch seamless carbon (nonalloy) steel pipe for offshore oil/gas gathering lines. Optimized for high-pressure hydrocarbon transport, this pipe is not of cast iron and meets the definition of line pipe under tariff item 7304.19.00.

20-Inch Diameter Gas Line Pipe

Large 20-inch seamless nonalloy steel pipe for high-volume natural gas transmission mains. Classified as line pipe for gas pipelines under tariff item 7304.19.00, with thick walls suitable for burial under highways.

2-inch OD Seamless Steel Oil Pipeline Pipe X42 Grade

High-strength seamless line pipe, 50.8 mm OD, API 5L X42 grade, nonalloy steel for crude oil gathering lines in onshore fields. Tariff item 7304.19.00 applies to its seamless form, small diameter, and dedicated oil pipeline function.

3-inch OD API 5L PSL1 Seamless Pipeline Tube

API 5L PSL1 compliant seamless nonalloy steel pipe, 76.2 mm OD, for standard oil/gas transmission lines. Tariff item 7304.19.00 covers its seamless, small-OD design for pipeline applications, excluding high-spec PSL2.

API 5L Grade B Seamless Line Pipe

This seamless steel tube, made from nonalloy steel, is specifically designed for oil and gas pipeline applications, meeting API 5L Grade B specifications for strength and durability. It falls under tariff item 7304.19.00 as seamless line pipe of iron or nonalloy steel.

API 5L Grade B Seamless Steel Line Pipe 4-inch OD

This seamless steel tube, made from nonalloy steel with an outside diameter of 114.3 mm or less, is specifically designed as line pipe for oil and gas pipelines, meeting API 5L Grade B standards for strength and durability.

Carbon Steel Sour Service Line Pipe

Seamless carbon steel pipe resistant to H2S in sour oil/gas service, API 5L compliant. Classified under tariff item 7304.19.00 for nonalloy seamless line pipe used in corrosive pipeline environments, with chemistry controlled for sulfide stress cracking resistance.

Grade B 10-Inch OD Pipeline Tube

10-inch OD Grade B seamless tube of nonalloy steel for midstream oil/gas pipelines. Falls under tariff item 7304.19.00 for its role in long-haul transport, distinct from downstream or upstream tubulars, and designed for easy coupling.

PSL1 Seamless Oil Line Pipe

PSL1 (Product Specification Level 1) seamless nonalloy steel pipe for crude oil lines, compliant with API 5L. Tariff item 7304.19.00 covers this as other seamless line pipe of iron/nonalloy steel for pipelines, suitable for sour service.

Seamless 4.5-inch OD Nonalloy Line Pipe for Sour Gas Service

Specialized seamless steel pipe, 114 mm OD, designed for sour gas pipelines with H2S resistance, nonalloy composition per NACE standards. Under tariff item 7304.19.00 for small-diameter seamless line pipe of iron/nonalloy steel.

Seamless Nonalloy Steel Line Pipe 3.5-inch OD for Gas Distribution

A seamless pipe of iron or nonalloy steel, outer diameter 88.9 mm, engineered for natural gas distribution pipelines with high pressure resistance. Classified under tariff item 7304.19.00 as line pipe for gas pipelines.

Seamless Steel Gas Line Pipe 2.375-inch OD 0.237-inch Wall

Schedule 40 seamless steel pipe, 60.3 mm OD x 6 mm wall, rated for natural gas distribution mains. Fits tariff item 7304.19.00 as nonalloy seamless line pipe under 114.3 mm OD for gas pipelines, corrosion-protected for buried service.

X42 Seamless Gas Transmission Pipe

Seamless nonalloy steel pipe rated X42 per API standards, used for natural gas transmission lines. It qualifies for tariff item 7304.19.00 as 'other' line pipe of iron/nonalloy steel for oil or gas pipelines, with high yield strength.

127 mm OD Stainless Steel Oilfield Drill Pipe

Heavy-duty seamless stainless steel drill pipe measuring 127 mm outside diameter with 8.5 mm wall thickness, engineered for high-pressure oil drilling. The stainless steel composition provides corrosion resistance and strength for demanding applications.

13Cr Stainless Steel Drill Pipe 4-1/2 Inch OD

Seamless 13% chromium (13Cr) stainless steel drill pipe, 4-1/2 inches in outer diameter, designed for corrosive environments such as sour gas wells. Equipped with premium connections for high-pressure drilling, it provides superior corrosion resistance and mechanical strength.

3.5-inch API Spec 5DP Stainless Drill Tubing

Seamless stainless steel drill tubing with 88.9 mm outer diameter and 7.3 mm wall thickness, compliant with API 5DP standards for oilfield drilling. This drill pipe is designed for use in drilling operations where corrosion resistance and strength are critical.

4.5-inch Stainless Steel Drill Pipe for Oil Rigs

Seamless stainless steel drill pipe with an outside diameter of 114.3 mm and wall thickness of 8 mm, designed specifically for oil and gas drilling operations. Its seamless construction and stainless steel composition provide durability and corrosion resistance in harsh environments.

4-inch Sour Service Stainless Steel Drill Pipe

Specialized 4-inch (101.6 mm OD) seamless stainless steel drill pipe with 8.2 mm wall thickness, rated for sour service in H2S environments during oil and gas drilling. The stainless steel construction provides corrosion resistance and mechanical strength for demanding applications.

5-inch Premium Stainless Drill Pipe for Gas Wells

Seamless 5-inch (127 mm) stainless steel drill pipe with 7.8 mm wall thickness, premium grade for natural gas well drilling. This drill pipe offers high strength and corrosion resistance, making it suitable for demanding drilling environments.

API 5DP Heavy Weight Drill Pipe 5 Inch Stainless Steel

Heavy weight drill pipe made from seamless stainless steel tubing, 5 inches in outer diameter, conforming to API 5DP specifications for oil and gas drilling. It features thick-walled construction and tool joints for connecting to drilling equipment, offering enhanced durability in demanding operations.

Austenitic Stainless Steel Drill Pipe 7 Inch Extended Reach

Austenitic stainless steel drill pipe (e.g., 316L), 7 inches in outer diameter, designed for extended reach horizontal drilling in shale oil plays. Seamless construction with low cycle fatigue design ensures reliability in high-stress drilling applications.

Duplex Stainless Steel Drill Pipe 6-5/8 Inch for Deepwater Drilling

Duplex stainless steel (e.g., 2205 grade) seamless drill pipe, 6-5/8 inches in outer diameter, engineered for deepwater oil exploration with a high strength-to-weight ratio. Features high collapse resistance and fatigue strength for extended service in harsh offshore environments.

Martensitic Stainless Drill Pipe 3-1/2 Inch Slim Hole

Martensitic stainless steel (e.g., 410/420 grade) drill pipe, 3-1/2 inches in outer diameter, for slim hole drilling in oil exploration. Seamless with high hardness for abrasive formations, providing wear resistance and strength in demanding downhole conditions.

Ph13-8Mo Stainless Precipitation Hardening Drill Pipe 5 Inch

PH13-8Mo precipitation hardening stainless steel drill pipe, 5 inches in diameter, for high-strength deep drilling. Seamless and heat-treatable, this alloy offers exceptional strength and corrosion resistance for extreme downhole conditions.

Stainless Steel Coiled Drill Pipe 2 Inch Continuous

Continuous coiled stainless steel drill pipe, 2 inches in outer diameter, for underbalanced drilling operations. Seamless and reelable, this pipe allows for continuous drilling without connections, improving efficiency in certain applications.

Stainless Steel Friction Weld Drill Pipe 4 Inch Sour Service

4-inch outer diameter stainless steel drill pipe with friction-welded tool joints, designed for sour service (H2S) environments in natural gas drilling. The seamless body provides corrosion resistance and strength for directional drilling applications.

Super Duplex Drill Pipe 5-7/8 Inch High Pressure

Super duplex stainless steel drill pipe (e.g., SAF 2507), 5-7/8 inches in outer diameter, for ultra-high pressure and H2S-resistant drilling in harsh oilfields. Seamless construction with integral upset ends enhances joint integrity and fatigue resistance.

3-1/2 Inch 13.30 lb/ft G-105 Range 2 Drill Pipe

> A 3-1/2 inch, 13.30 lb/ft, G-105 grade seamless drill pipe made of nonalloy steel, designed for slimhole directional drilling in gas wells. It is equipped with an internal plastic coating for corrosion protection and falls under tariff item 7304.23.00 as other drill pipe of iron or nonalloy steel.

3-1/2 Inch 15.50 lb/ft X95 NC50 Connection Drill Pipe

> A 3-1/2 inch, 15.50 lb/ft, X95 grade seamless drill pipe made of nonalloy steel, equipped with NC50 tool joint connections and spiral hardbanding for high-torque slimhole applications in shale gas drilling. It is classified under tariff item 7304.23.00 as other drill pipe of iron or nonalloy steel.

4-1/2 Inch 16.60 lb/ft P110 HWDP

> A 4-1/2 inch, 16.60 lb/ft, P110 grade heavy weight drill pipe (HWDP) made of seamless nonalloy steel, used for stabilizing the bottom-hole assembly in directional drilling. It features a thicker center upset and is classified under tariff item 7304.23.00 as other drill pipe of iron or nonalloy steel.

4-1/2 Inch 16.60 lb/ft X-95 Drill Pipe

> A 4-1/2 inch, 16.60 lb/ft, X-95 grade seamless drill pipe made of nonalloy steel, designed for high-strength sour service environments in oil drilling. It features friction weld upset ends for tool joint connections and is classified under tariff item 7304.23.00 as other drill pipe.

4 Inch 14.00 lb/ft E75 Sour Service Drill Pipe

> An E75 grade seamless drill pipe optimized for H2S sour service environments in natural gas drilling, with a 4-inch OD and 14 lb/ft weight, made of nonalloy steel. It meets NACE MR0175 standards for sulfide stress cracking resistance and is classified under tariff item 7304.23.00.

5-1/2 Inch 21.90 lb/ft S135 High Torque Drill Pipe

> A 5-1/2 inch, 21.90 lb/ft, S135 grade high torque seamless drill pipe made of nonalloy steel, designed for challenging extended-reach oil wells. It features double shoulder premium connections and is classified under tariff item 7304.23.00 as other drill pipe.

5 Inch 19.50 lb/ft S-135 Premium Class Drill Pipe

> A premium class seamless drill pipe in S-135 grade nonalloy steel, with a 5-inch OD and 19.50 lb/ft weight, suitable for deepwater oil exploration with enhanced fatigue resistance. It features hardbanding on tool joint ends and is classified under tariff item 7304.23.00.

6-5/8 Inch 24.00 lb/ft P110 Drill Pipe

> A heavy-duty P110 grade seamless nonalloy steel drill pipe with a 6-5/8 inch OD and 24 lb/ft weight, designed for extended reach horizontal oil drilling. It includes phosphate coating for rust prevention during storage and is classified under tariff item 7304.23.00.

6-5/8 Inch 27.70 lb/ft V150 Drill Pipe

> A V150 ultra-high strength seamless nonalloy steel drill pipe with a 6-5/8 inch OD and 27.70 lb/ft weight, designed for ultra-deep HPHT wells. It meets API 5DP premium class specifications and is classified under tariff item 7304.23.00.

API 5DP Grade E75 Heavy Weight Drill Pipe

> A heavy weight drill pipe made from nonalloy steel with seamless construction, used in oil and gas drilling operations to transmit rotary motion and drilling fluid. It features thick-walled sections for enhanced strength and is classified under tariff item 7304.23.00 as other drill pipe.

10-3/4 Inch 51.2 lb/ft Q125 Stainless Casing

Seamless stainless steel casing pipe, 10-3/4 inch, Q125 grade, with integral EUE threads, designed for high-pressure/high-temperature geothermal and ultra-deep drilling. Its seamless stainless steel construction and oilfield casing use classify it under tariff item 7304.24.00.

13-3/8 Inch 54.5 lb/ft 13Cr Stainless Casing

Seamless stainless steel casing, 13-3/8 inch, 13Cr grade, with BTC threaded couplings, for sour gas service with H2S environments. Its stainless steel composition and seamless construction for oil/gas drilling place it under tariff item 7304.24.00.

16 Inch 94 lb/ft Conductor Casing Stainless

Heavy wall 16-inch stainless steel conductor casing with welded couplings, seamless, for offshore platform installation as structural drive pipe. Its stainless steel seamless construction for oil/gas drilling classifies under tariff item 7304.24.00.

2-7/8 Inch L80 Type 316L Stainless Casing

Corrosion-resistant Type 316L stainless steel seamless casing, 2-7/8 inch OD, 6.45 mm wall, threaded and coupled with STC ends per API specs, for sour gas wells. Its stainless steel seamless construction for oil/gas drilling classifies under tariff item 7304.24.00.

3-1/2 Inch P110 Stainless Steel Threaded Casing

High-pressure P110 grade seamless stainless steel casing, 3-1/2 inch OD, 7.72 mm wall, with premium EUE threaded couplings, for deep oil/gas wells. Its stainless steel seamless construction places it under tariff item 7304.24.00.