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Importance of API Monogram Licenses

API Monogram Program:

The API monogram program is a voluntary licensing program designed to facilitate the consistent manufacturing of a product that conforms to applicable API specifications. API monogram certification is highly recognized across the world as the seal of approval for quality and reliable product performance. The program requires that manufacturers maintain the capabilities, including the resources, processes and technology, to manufacture products that fall within the scope of licensing. The API monogram program gives licensed manufacturers are given the authority to use the API monogram registered mark to equipment that meets the requirements.

API monogram certification is applicable for the manufacturers of production equipment, drilling equipment and now, even refinery equipment, the API monogram program lets companies demonstrate the product are meeting the global quality requirements and usability in the global petroleum and natural gas industry market.

The monogram licensee must implement, maintain and continually improve your quality management system to meet the oil and gas industry’s quality management system specification of API Spec Q1. The API monogram licenses are only issued after an on-site audit has verified that the facility meets the monogram program requirements. Licensees are required to maintain continued management system conformity to API Spec Q1 standard as well as the API product certification and program requirements. In order for a license to remain active, the licensee must go through a renewal audit after each 3 years period.

API Monogram Mark:

More than 5,000 businesses across the globe from small entrepreneurial firms to large multinational organizations are authorized to use the API monogram and APIQR marks.

The API monogram is an API registered certification mark. Through the API monogram program, licensed manufacturers are given the authority to apply the mark to equipment that meets API product specification requirements and has been manufactured within a quality management system that meets API Spec Q1.

The API monogram mark is a protected trademark that is authorized for use by API through legally enforceable program requirements via contract agreements with the Licensees. The mark can only be applied to a new conforming product that is manufactured by the licensed organization at the licensed facility.

Below is a comprehensive list of all API monogram licenses and their associated products. Essentially the list consists of the specifications for which API offers Monogram licenses. More than 76 API product specifications for which API issues monogram licenses.

API Monogram Licenses & Licensing Information

Product Description
API Spec 2BFabrication of Structural Steel Pipe

Steel Pipe

API Spec 2COffshore Pedestal-Mounted Cranes

Offshore Cranes

API Spec 2FMooring Chain

Flash Welded Chain; Forged Connecting Links

API Spec 2HCarbon Manganese Steel Plate for Offshore Platform Tubular Joints

Grade 42 Steel Plate; Grade 50 Steel Plate

API Spec 2MT1As-Rolled Carbon Manganese Steel Plate with Improved Toughness for Offshore Structures

Steel Plate, Grade 2MT1

API Spec 2MT2Rolled Shapes with Improved Notch Toughness

Steel Rolled Shapes

API Spec 2WSteel Plates for Offshore Structures, Produced by Thermo-Mechanical Control Processing (TMCP)

Grade 50 Steel Plate; Grade 60 Steel Plate; Grade 70 Steel Plate; Grade 80 Steel Plate

API Spec 2YSteel Plates, Quenched-and-Tempered, for Offshore Structures

Grade 50 Steel Plate; Grade 60 Steel Plate

API Spec 4FDrilling and Well Servicing Structures

Derricks; Masts; Crown Block Assemblies; Substructures

API Spec 5BThreading, Gauging, and Thread Inspection of Casing, Tubing and Line Pipe Threads

Thread Gauges

API Spec 5CRACorrosion Resistant Alloy Seamless Tubes for Use as Casing, Tubing and Coupling Stock

Manufacturer of Casing, Tubing or Coupling Stock at PSL 1; Manufacturer of Casing, Tubing or Coupling Stock at PSL 2, at Groups 1, 2, 3, 4

API Spec 5CTCasing and Tubing

Manufacturer of Casing or Tubing Plain End; Manufacturer of Casing or Tubing Threaded and Coupled; Manufacturer of Casing or Tubing Pup Joints; Manufacturer of Casing or Tubing Couplings; Manufacturer of Accessories; Processor of Casing or Tubing Plain End; Processor of Casing or Tubing Threaded and Coupled; Threader, at Groups 1, 2, 3, 4

API Spec 5DPDrill Pipe

Drill Pipe Body; Tool Joints; Drill Pipe (Assembly)

API Spec 5LLine Pipe

Manufacturer of Line Pipe – Plain End at PSL 1; Manufacturer of Line Pipe – Plain End at PSL 2; Manufacturer of Line Pipe – Threaded and Coupled; Manufacturer of Line Pipe Couplings; Processor of Line Pipe – Plain End at PSL 1; Processor of Line Pipe – Plain End at PSL 2; Processor of Line Pipe – Threaded and Coupled; Threader

API Spec 5LCCRA Line Pipe

Manufacturer of Alloy Pipe; Processor of Alloy Pipe

API Spec 5LCPCoiled Line Pipe

Coiled Line Pipe

API Spec 5LDCRA Clad or Lined Steel Pipe

Manufacturer of Clad Steel Pipe; Manufacturer of Lined Steel Pipe; Processor of Clad Steel Pipe; Processor of Lined Steel Pipe

API Spec 5STCoiled Tubing

Manufacturer of Coiled Tubing

API Spec 6AWellhead and Christmas Tree Equipment

Manufacturer of Casing and Tubing Heads; Cross-Over Connectors; Tubing Head Adapters; Top Connectors; Tees and Crosses; Fluid-Sampling Devices; Adapter and Spacer Spools; Casing and Tubing Hangers; Valves; Chokes; Surface and Underwater Safety Valves; Surface and Underwater Safety Valve Actuators; Back Pressure Valves; Blind and Test Flanges; Threaded Connectors; Other End Connectors; Bullplugs; Valve Removal Plugs; Actuators; Ring Gaskets at PSL 1 – 4

API Spec 6AV1Validation of Wellhead Surface Safety Valves and Underwater Safety Valves for Offshore Service

Testing Agency

API Spec 6DPipeline and Piping Valves (Steel Gate, Plug, Ball, and Check Valves)

Steel Gate Valves; Plug Valves; Ball Valves; Check Valves

API Spec 6DSSSubsea Pipeline Valves

Subsea Gate Valves; Subsea Plug Valves; Subsea Ball Valves; Subsea Check Valves

API Spec 7-1Rotary Drill Stem Elements

Kelly Valves; Kellys; Drill Stem Subs; Drill Collars; Heavy Weight Drill Pipe; Roller Bits; Blade Drag Bits; Diamond Bits; PDC Bits; Threading for Rotary Shouldered Connections; Stabilizers

API Spec 7-2Threading and Gauging of Rotary Shouldered Connections

Rotary Shouldered Connection Gauges

API Spec 7FOil Field Chain and Sprockets

Roller Chain

API Spec 7KDrilling and Well Servicing Equipment

Rotary Tables, Rotary Bushings, Rotary Slips, Piston Mud Pump Components, Drawworks Components, Spiders, Manual Tongs, Safety Clamps Not used as Hoisting Devices, BOP Handling Systems, Pressure Relieving Devices for High-Pressure Drilling Fluid Circulating Systems, Snub-Lines for Manual and Power Tongs, Slip Bowls, High Pressure Mud and Cement Hoses at FSL 0, 1, and 2

API Spec 7NRVDrill String Non-return Valves

Drill String Non Return Valves, Non Return Valve Subs, Non Return Valve Landing Nipples, Non Return Valve Equalizing Heads

API Spec 8CDrilling and Production Hoisting Equipment (PSL 1 and PSL 2)

Hoisting Sheaves, Traveling Blocks and/or Hook Blocks; Block-to-Hook Adapters, Connectors and Link Adapters, Drilling Hooks, Tubing and Sucker Rod Hooks; Elevator Links, Casing, Tubing and Drill Pipe Elevators, Sucker Rod Elevators; Rotary Swivel Bail Adapters, Rotary Swivels; Power Swivels, Power Subs; Spiders (if capable of being used as elevators), Wire-line Anchors; Drill-String Motion Compensators; Kelly Spinners (if capable of being used as hoisting equipment); Pressure Vessels and Piping Mounted onto Hoisting Equipment; Safety Clamps (if capable of being used as hoisting equipment); Guide Dollies for Traveling Equipment at PSL 1 and 2

API Spec 9AWire Rope

Bright or Drawn-Galvanized Wire Rope; Mooring Wire Rope; Torpedo Lines; Well-Measuring Wire; Well-Measuring Strand; Wire Guy Strand; Structural Rope and Strand

API Spec 10ACements and Materials for Well Cementing

API Well Cement Class A, Type [O]; Class B, Type [MSR, HSR]; Class C, Type [O, MSR, HSR]; Class D, Type [MSR, HSR]; Class G, Type [MSR, HSR]; Class H, Type [MSR, HSR]

API Spec 10DBow-Spring Casing Centralizers

Casing Centralizers

API Spec 11AXSubsurface Sucker Rod Pump Assemblies, Components, and Fittings

Pump and Pump Parts; Pump Parts without Tubing or Sucker Rod Threads; Seating Cups

API Spec 11BSucker Rods, Polished Rods and Liners, Couplings, Sinker Bars, Polished Rod Clamps, Stuffing Boxes, and Pumping Tees

Steel Sucker Rods; FRP Sucker Rods; Couplings, Sub-couplings and Polished Rod Connections; Polished Rods; Polished Rod Clamps; Stuffing Box and Pumping Tees; Sinker Bars; Threads; Thread Gages

API Spec 11D1Packers and Bridge Plugs

Downhole Equipment-Packers; Bridge Plugs

API Spec 11EPumping Units

Pumping Unit Structure; Pumping Unit Gear Reducer

API Spec 12BBolted Tanks for Storage of Production Liquids

Storage Tanks

API Spec 12DField Welded Tanks for Storage of Production Liquids

Storage Tanks

API Spec 12FShop Welded Tanks for Storage and Production Liquids

Storage Tanks

API Spec 12JOil and Gas Separators


API Spec 12KIndirect Type Oilfield Heaters

Heaters; Shells; Coils

API Spec 12LVertical and Horizontal Emulsion Treaters


API Spec 12PFiberglass Reinforced Plastic Tanks

FRP Tanks

API Spec 13ADrilling-Fluid Materials

Barite; Barite 4,1 Hematite; Bentonite; Nontreated Bentonite; Attapulgite; Sepiolite; CMC-LVT; CMC-HVT; Starch; OCMA Grade Bentonite; PAC-LV; PAC-HV; Drilling-Grade Xanthan Gum

API Spec 14ASubsurface Safety Valve Equipment

Subsurface Safety Valves

API Spec 14LLock Mandrels and Landing Nipples

Lock Mandrels; Landing Nipples

API Spec 15HRHigh Pressure Fiberglass Line Pipe

Line Pipe; Couplings; Fittings; Flanges; Reducers and Adapters

API Spec 15LEPolyethylene Line Pipe (PE)

Line Pipe; Fittings

API Spec 15LRLow Pressure Fiberglass Line Pipe

CC Line Pipe; FW Line Pipe

API Spec 15SSpoolable Reinforced Plastic Line Pipe

Non-metallic Reinforced Pipe, End Fittings, Coupling Fittings

API Spec 16ADrill-Through Equipment

Ram BOP; Ram Blocks, Packers, and/or Top Seals; Annular BOP; Annular Packing Units; Hydraulic Connectors; Drilling Spools; Adapters; Hub and Clamp End Connectors

API Spec 16CChoke and Kill Equipment

Articulated Choke and Kill Lines; Choke and Kill Manifold Buffer Chamber; Drilling Choke Actuators; Drilling Choke Controls; Drilling Chokes; Rigid Choke and Kill Lines; Flexible Choke and Kill Lines at FSL 0, FSL 1, FSL 2 and/or FSL 3

API Spec 16DControl Systems for Drilling Well Control Equipment and Control Systems for Diverter Equipment

Control Systems for Surface Mounted BOP Stacks; Hydraulic Control Systems for Subsea BOP Stacks; Electro-Hydraulic/Multiplex Control Systems for Subsea BOP Stacks; Diverter Control Systems; Emergency Backup BOP Control Systems; Auxiliary Equipment Control Systems and Interfaces

API Spec 16FMarine Drilling Riser Equipment

Riser Tensioner Equipment; Flex/Ball Joints; Telescopic Joint (Slip Joint) and Tensioner Ring; Riser Joints; Buoyancy Equipment (syntactic foam modules only); Riser Running Equipment; Lower Riser Adapter

API Spec 16RCDRotating Control Devices

Drill through Equipment; RCD Packers

API Spec 17DDesign and Operation of Subsea Production Systems—Subsea Wellhead and Tree Equipment

Subsea Tree Equipment, Subsea Wellhead Equipment, Mudline Suspension System Equipment, Other Equipment at PSL 2, 3, 3G

API Spec 17ESubsea Production Control Umbilicals

Hose Umbilicals; Electrical Umbilicals; Electro-Hydraulic Umbilicals

API Spec 17FSubsea Production Control Systems

Subsea Production Control Systems

API Spec 17JUnbonded Flexible Pipe

Unbonded Flexible Pipe

API Spec 17KBonded Flexible Pipe

Bonded Flexible Pipe

API Spec 19ACCompletion Accessories

Pressure Containing and Non-Pressure Containing Completion Accessories

API Spec 19G1Side-Pocket Mandrels

Side-Pocket Mandrels

API Spec 19G2Flow-Control Devices for Side-Pocket Mandrels

GROUP I: Injection Pressure Operated; Balanced Injection Pressure Operated; Injection Pressure Operated w/ choke.

GROUP II: Production Pressure Operated; Production Pressure Operated w/ choke.

GROUP III: Pilot: Differential.

GROUP IV: Orifice; Nozzle venture; Shear orifice; Dump/kill.

GROUP V: Dummy.

GROUP VI: Chemical injection; Chemical injection, spring loaded.

GROUP VII: Surface-controlled hydraulic; Surface-controlled electric; Smart. GROUPVIII: Liquid injection.

GROUP IV: Measure pressure; Measure temperature; Monitor corrosion; Connect to other devices; Provide control logic

API Spec 19G3Running Tools, Pulling Tools and Kick-Over Tools and Latches for Side-Pocket Mandrels

Running and Pulling Tools; Kick-over Tools; Latches

API Spec 19VSubsurface Barrier Valves and Related Equipment

Type A, B, C, AA, BB and CC Barrier Valves; Barrier Valve Tools

API Spec 20ACarbon Steel, Alloy Steel, Stainless Steel, and Nickel Base Alloy Castings for Use in the Petroleum and Natural Gas Industry

Carbon Steels; Low Alloy Steels; Stainless Steels Other Than Duplex; Duplex Stainless Steels; Nickel Base Alloys (CRA)

API Spec 20BOpen Die Shaped Forgings for Use in the Petroleum and Natural Gas Industry

Carbon and Microalloyed Steels; Low Alloy Steels; Austenitic, Martensitic and Martensitic Precipitation Hardening Stainless Steels; Duplex and Superduplex Stainless Steels; Nickel Based Alloys

API Spec 20CClosed Die Forgings for Use in the Petroleum and Natural Gas Industry

Carbon and Low-Alloy Carbon Steels; Austenitic, Martensitic and PH Martensitic Stainless Steels; Corrosion-Resistant Alloys

API Spec 20EAlloy and Carbon Steel Bolting for Use in the Petroleum and Natural Gas Industries

Cold Formed Bolts, Screws, and Nuts; Studs; Fully Machined Bolts, Screws, and Nuts; Hot Formed Bolts and Screws; Hot formed nuts

API Spec 20FCorrosion Resistant Bolting for Use in the Petroleum and Natural Gas Industries

Machined Studs; Machined Bolts, Screws, and Nuts; Cold Formed Bolts, Screws, and Nuts; Hot Formed Bolts and Screws; Roll Threaded Studs, Bolts, and Screws; Hot Formed Nuts

API Standard 547General-Purpose Form-Wound Squirrel Cage Induction Motors-250 Horsepower and Larger


API Standard 594Check Valves: Flanged, Lug, Wafer, and Butt-Welding

Check Valves, Type A & B

API Standard 599Metal Plug Valves

Metal Plug Valves

API Standard 600Steel Gate Valves-Flanged and Butt-Welding Ends, Bolted Bonnets

Bolted Bonnet Steel Gate Valves

API Standard 602Gate, Globe, and Check Valves for Sizes DN 100 (NPS 4) and Smaller for the Petroleum and Natural Gas Industries

Compact Steel Gate Valves, Globe Valves; Valves

API Standard 603Corrosion-Resistant, Bolted Bonnet Gate Valves—Flanged and Butt-Welding Ends

Corrosion-Resistant Bolted Bonnet Gate Valves

API Standard 608Metal Ball Valves-Flanged, Threaded, and Welding Ends

Metal Ball Valves

API Standard 609Butterfly Valves: Double-Flanged, Lug- and Wafer-Type

Butterfly Valves – Categories A & B

API Standard 650Welded Tanks for Oil Storage

Fabricated Steel Plates: Shop Built Tanks

How Vegas Consulting Can help Your Organization Achieve API Monogram Certification?

Vegas Consulting has proven experience in API monogram consulting by helping manufacturing organizations achieve API monogram certification. We have conducted various types of API audits against API monogram specifications, such as internal audits, gap analysis, process audits, product audits, supplier audits. Our API monogram consultant can help you implement an API audit program that is suitable for your organization and that can be carried out effectively and consistently. Get started with us for the first step to apply API monogram certification. Click here to get a free quote or discussion about the API monogram license.