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API Monogram Program & APIQR

API is committed to maintaining the highest level of confidence in its certification and/or licensing activities by providing impartial and objective assessments of its client’s management systems. This commitment is supported by processes that manage conflicts of interest, ensure personnel competence, maintain confidentiality of information while promoting openness, and enable communication with all stakeholders.

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What does the API Monogram Mean to the Oil and Gas Industry?

API Monogram/APIQR Program Updates, June 2017

What is the API Monogram Program?

The API Monogram Program is a voluntary licensing program designed to facilitate the consistent manufacturing of product that conforms to API standards. 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 program gives licensed manufacturers an opportunity to mark conforming product so that it is easily recognizable and identifiable in the field.  The Licensee must implement, maintain and continually improve their quality management system to meet the oil and gas industry’s quality management system specification, API Spec Q1. The API Monogram Licenses are only issued after an on-site audit has verified that the facility meets the program requirements. Licensees are required to maintain continued management system conformity to API Spec Q1 as well as the product standard and program requirements. In order for a license to remain active, the licensee must go through a renewal audit after each 3 year period.  All licensees, licensing information and licensing statuses are identified on the API Composite List, an on-line directory. The program requirements and obligations, including use of the mark, reporting on nonconforming equipment, QMS conformity with API Spec Q1, and product conformity with the specification, are enforced through a legally binding agreement between API and the Licensee.

What is the API Monogram Mark?

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.

API has established specific requirements for control and use of the mark.  Licensees are required to document, implement and maintain Monogram Mark controls based on the requirements. The rights and authorities to use the mark are facility and location specific and can only be applied to new products in conjunction with the facility’s license number and the date of manufacture. Use of the Monogram and license number on conforming product provides traceability back to the original manufacturer of the product and the original design and manufacturing specifications.

What does the API Monogram mean?

The use of the API Monogram on product constitutes a representation and warranty by the licensed manufacturer that, on the date of manufacture, the product conforms to all applicable, current editions of specifications, standards and requirements of API.


  • The Monogram Mark is a protected trademark
  • Legally enforceable program requirements through contract agreements with the Licensees
  • The mark can only be applied to new, conforming product, manufactured by the Licensed organization at the Licensed facility
  • Industry initiative that supports its commitment to improve safety and reliability of oil and gas industry equipment and operations

To Manufacturers

  • A way to be recognized by API and industry for product quality
  • Recognition of their capability to manufacture products that meet API specifications
  • A means to physically mark and identify conforming product(s)

To Equipment Purchasers and End-Users

  • Verification that the products meet the requirements of the API specifications and standards
  • Manufacturers have implemented a management system that provides assurances that processes have been implemented to provide consistent, conforming products
  • Manufacturers have implemented processes and controls to identify and address customer requirements, customer complaints and product issues
  • A method to trace products back to the original manufacturer, design and performance requirements
  • A means to report industry product and process issues and nonconformities
  • Visible identification in the field that a product was manufactured to conform to an API product specification or standard

Use of the API Monogram Mark

Use of APIQR Marks

Monogram/APIQR Impartiality Policy

Below is the full list of API specifications and standards for which Monogram licenses are available, with downloadable Licensing Information Forms (LIFs). LIFs provide the specific products that can be licensed and will help your organization determine the best scope for your API Monogram License.

This product information can be added or changed in your online applications – both New and Renewals. Submit an LIF only when requesting a change to the scope of your current license between Renewal applications. Send completed forms to

The API Monogram mark on products is a warranty by API Monogram licensees to API and purchasers that the marked products comply in every aspect with the applicable API Specification/Standard in effect at the time of manufacture.

List of Monogram Licenses & Licensing Information Forms

API 2B - Fabrication of Structural Steel Pipe
Steel Pipe

API 2C - Offshore Pedestal-Mounted Cranes
Offshore Cranes

API 2F - Mooring Chain
Flash Welded Chain; Forged Connecting Links

API 2H - Carbon Manganese Steel Plate for Offshore Structures
Grade 42 Steel Plate; Grade 50 Steel Plate

API 2MT1 - Carbon Manganese Steel Plate with Improved Toughness for Offshore Structures
Steel Plate, Grade 2MT1

API 2MT2 - Rolled Shapes with Improved Notch Toughness
Steel Rolled Shapes

API 2W - Steel Plates for Offshore Structures, Produced by Thermo-Mechanical Control Processing (TMCP)
Grade 50 Steel Plate; Grade 60 Steel Plate

API 2Y - Steel Plates, Quenched-and-Tempered, for Offshore Structures
Grade 50 Steel Plate; Grade 60 Steel Plate

API 4F - Drilling and Well Servicing Structures
Derricks; Masts; Crown Block Assemblies; Substructures

API 5B - Threading, Gauging, and Thread Inspection of Casing, Tubing and Line Pipe Threads
Thread Gauges

API 5CRA - Corrosion 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 5CT - Casing 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 5DP - Drill Pipe
Drill Pipe Body; Tool Joints; Drill Pipe (Assembly)

API 5L - Line 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 5LC - CRA Line Pipe
Manufacturer of Alloy Pipe; Processor of Alloy Pipe

API 5LCP - Coiled Line Pipe
Coiled Line Pipe

API 5LD - CRA 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 5ST - Coiled Tubing—U.S. Customary and SI Units
Manufacturer of Coiled Tubing

API 6A - Wellhead 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; Flanged Connectors; Threaded Connectors; Other End Connectors; Bullplugs; Valve Removal Plugs; Actuators; Ring Joint Gaskets at PSL 1 - 4

API 6AV1 - Verification Test of Wellhead Surface Safety Valves and Underwater Safety Valves for Offshore Use
Testing Agency

API 6D - Pipeline and Piping Valves
Steel Gate Valves; Plug Valves; Ball Valves; Check Valves

API 6DSS - Subsea Pipeline Valves
Subsea Gate Valves; Subsea Plug Valves; Subsea Ball Valves; Subsea Check Valves

API 7-1 - Rotary 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 7-2 - Threading and Gauging of Rotary Shouldered Connections
Rotary Shouldered Connection Gauges

API 7F - Oil Field Chain and Sprockets
Roller Chain

API 7K - Drilling 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 7NRV- Drill String Non-Return Valves
Drill String Non Return Valves, Non Return Valve Subs, Non Return Valve Landing Nipples, Non Return Valve Equalizing Heads

API 8C - Drilling and Production Hoisting Equipment (PSL 1 and PSL 2)
Hoisting Sheaves, Traveling Blocks and 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), Wireline 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 9A - Wire 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 10A - Cements 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 10D - Bow-Spring Casing Centralizers
Casing Centralizers

API 11AX - Subsurface Sucker Rod Pump Assemblies, Components, and Fittings
Pump and Pump Parts; Pump Parts without Tubing or Sucker Rod Threads; Seating Cups

API 11B - Sucker Rods, Polished Rods and Liners, Couplings, Sinker Bars, Polished Rod Clamps, Stuffing Boxes, and Pumping Tees
Steel Sucker Rods; FRP Sucker Rods; Couplings, Subcouplings and Polished Rod Connections; Polished Rods; Polished Rod Clamps; Stuffing Box and Pumping Tees; Sinker Bars; Threads; Thread Gages

API 11D1 - Packers and Bridge Plugs
Downhole Equipment-Packers; Bridge Plugs

API 11E - Pumping Units
Pumping Unit Structure; Pumping Unit Gear Reducer

API 12B - Bolted Tanks for Storage of Production Liquids
Storage Tanks

API 12D - Field Welded Tanks for Storage of Production Liquids
Storage Tanks

API 12F - Shop Welded Tanks for Storage and Production Liquids
Storage Tanks

API 12J - Oil and Gas Separators

API 12K - Indirect Type Oilfield Heaters
Heaters; Shells; Coils

API 12L - Vertical and Horizontal Emulsion Treaters

API 12P - Fiberglass Reinforced Plastic Tanks
FRP Tanks

API 13A - Drilling-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 14A - Subsurface Safety Valve Equipment
Subsurface Safety Valves; Testing Agency

API 14L - Lock Mandrels and Landing Nipples
Lock Mandrels; Landing Nipples

API 15HR - High Pressure Fiberglass Line Pipe
Line Pipe; Couplings; Fittings; Flanges; Reducers and Adapters

API 15LE - Polyethylene Line Pipe (PE)
Line Pipe; Fittings

API 15LR - Low Pressure Fiberglass Line Pipe
CC Line Pipe; FW Line Pipe

API 15S - Spoolable Reinforced Plastic Line Pipe
Non-metallic Reinforced Pipe, End Fittings, Coupling Fittings

API 16A - Drill-Through Equipment
Ram BOP; Ram Blocks, Packers, and/or Top Seals; Annular BOP; Annular Packing Units; Hydraulic Connectors; Drilling Spools; Adapters; Loose Connections; Clamps

API 16C - Choke and Kill Equipment
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 16D - Control 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 16F - Marine 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 16RCD - Rotating Control Devices
Drill through Equipment; RCD Packers

API 16R - Marine Drilling Riser Couplings
Marine Drilling Riser Couplings

API 17D - Design 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 17E - Subsea Umbilicals
Hose Umbilicals; Electrical Umbilicals; Electro-Hydraulic Umbilicals

API 17J - Unbonded Flexible Pipe
Unbonded Flexible Pipe

API 17K - Bonded Flexible Pipe
Bonded Flexible Pipe

API 19AC - Completion Accessories
Pressure Containing and Non-Pressure Containing Completion Accessories

API 19G1 - Side-Pocket Mandrels
Side-pocket Mandrels

API 19G2 - Flow-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 19G3 - Running Tools, Pulling Tools and Kick-Over Tools and Latches for Side-Pocket Mandrels
Running and Pulling Tools; Kick-over Tools; Latches

API 19V - Subsurface Barrier Valves and Related Equipment
Type A, B, C, AA, BB and CC Barrier Valves; Barrier Valve Tools

API 20A - Carbon 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 20B - Open 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 20C - Closed 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 20E - Alloy 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 20F - Corrosion Resistant Bolting for Use in the Petroleum and Natural Gas Industries
Machined Studs; Machined Bolts, Screws, and Nuts; Cold Headed Bolts, Screws, and Nuts; Hot Formed Bolts and Screws; Roll Threaded Studs, Bolts, and Screws; Hot Formed Nuts

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

API 594 - Check Valves: Flanged, Lug, Wafer, and Butt-Welding
Check Valves, Type A & B

API 599 - Metal Plug Valves-Flanged, Threaded, and Welding Ends
Metal Plug Valves

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

API 602 - Gate, 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 603 - Corrosion-Resistant, Bolted Bonnet Gate Valves—Flanged and Butt-Welding Ends
Corrosion-Resistant Bolted Bonnet Gate Valves

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

API 609 - Butterfly Valves: Double-Flanged, Lug- and Wafer-Type
Butterfly Valves – Categories A & B

API 650 - Welded Tanks for Oil Storage
Fabricated Steel Plates: Shop Built Tanks

API Quality Registrar (APIQR) is accredited by the ANAB  (ANSI-ASQ National Accreditation Board) for ISO 9001 and ISO 14001. APIQR can register your organization to ISO 9001, API Spec Q1, API Spec Q2, ISO 14001 and OHSAS 18001 simply and easily.

ISO 9001

Global demands and an increasingly competitive business environment in the oil and natural gas industry have created new measures by which organizations must demonstrate their abilities. That’s where the APIQR can help. APIQR can register your company to ISO 9001.

API Spec Q1

Based on API’s Spec Q1, Specification for Quality Programs, companies that either manufacture products to API specifications, or provide industry services not covered by an API standard, can apply for API Spec Q1 Registration. By meeting the quality system requirements of API Spec Q1, companies can show their customers they meet the industry’s demands by becoming an API Spec Q1 Registered Organization.

API Spec Q2

API Spec Q2 is the first international quality management system standard for service supply organizations offered by the American Petroleum Institute. Published in December 2011, API Spec Q2, Specification for Quality Management System Requirements for Service Supply Organizations for Petroleum and Natural Gas Industries outlines fundamental quality management system requirements that are critical to upstream operations. The industry-written specification applies to critical activities such as well construction, intervention, production, abandonment, well servicing, equipment repair and maintenance, and inspection activities.

Service supply organizations will implement the requirements of API Spec Q2 throughout their quality management systems, creating a larger, more qualified service supply base. Compliant service supply organizations will boast superior quality management systems that control all operational processes, provide consistent results, manage change effectively, continually improve, reduce operational downtime, and increase customer satisfaction.

A known leader in management system certification, API offers organizations the opportunity to show the world they take quality seriously.

ISO 14001

A clean environment is important to everyone. And the oil and natural gas industry is doing its part to keep its impact on land, air, and water to a minimum. APIQR is pleased to offer environmental management system registration to ISO 14001. Our two-phased audit approach by experienced professionals provides an efficient and cost-effective vehicle for attaining this increasingly sought-after registration.

OHSAS 18001

People are your business’s most valuable assets, and assets must be protected. Through the effective implementation of an occupational health and safety management system, risks to your employees are identified and removed before any harm is felt. Your employees are safe and your business continues. API offers management system registration to the globally recognized standard for health and safety, OHSAS 18001.