API St 20L-2018 PDF

Full title and description

API STD 20L — Qualification of Polymeric (nonmetallic) Seal Manufacturers for Use in the Petroleum and Natural Gas Industries. First edition (2018). This API supply‑chain qualification standard defines the minimum technical, quality and documentation requirements for manufacturers of polymeric seals (thermoplastics, thermosets, elastomers and related nonmetallic sealing components) when referenced by API product standards or called out by purchasers in the oil & gas sector.

Abstract

API STD 20L (2018) establishes requirements for qualification, process control, inspection, identification/traceability, handling, nonconformance control and records for manufacturers of polymeric seals used in petroleum and natural gas equipment. It is intended to ensure consistent quality and supply‑chain assurance where API product standards or purchasers require polymeric seal manufacturer qualification.

General information

• Status: Superseded (replaced by API STD 20L, 2nd edition published September 2025).
• Publication date: April 1, 2018 (1 April 2018; first edition).
• Publisher: American Petroleum Institute (API).
• ICS / categories: 23.040.80 (Seals for pipe and hose assemblies); 75.180 (Equipment for the petroleum and natural gas industries) — applicable to fluid‑systems and oil & gas equipment supply chains.
• Edition / version: 1st edition (2018).
• Number of pages: 28 pages (first edition PDF).

Scope

Specifies qualification and process requirements for organizations that manufacture polymeric sealing components for equipment used in the petroleum and natural gas industries. The scope covers requirements for manufacturer qualification, process control and validation, control of outsourced processes and materials, inspection and testing, identification and traceability, handling and storage, management of change (MOC), nonconforming product control, and records/document control. It does not cover installers or entities that only assemble externally supplied parts without manufacturing polymeric seals.

Key topics and requirements

• Manufacturer qualification criteria: organizational, technical and quality system requirements for polymeric seal producers.
• Process control and documentation: validated manufacturing processes, process monitoring and acceptance criteria for thermoplastics, thermosets and elastomers.
• Control of outsourced processes and purchased materials: supplier evaluation, incoming inspection and material traceability.
• Inspection and testing requirements: incoming, in‑process and final inspection; test methods and acceptance criteria where specified.
• Identification, traceability and marking: batch/lot identification and traceability through manufacture, test and delivery.
• Nonconforming product control and corrective action: disposition, segregation, root‑cause analysis and corrective actions.
• Packaging, storage and handling: provisions to protect polymeric seals from contamination, degradation and aging.
• Management of change and records/document control: controlled updates, revision management and retention of qualification/production records.

Typical use and users

Used by polymeric seal manufacturers, quality managers, procurement and supply‑chain teams, QA/QC inspectors, and engineering groups within OEMs, EPCs and operators who specify or purchase polymeric seals for valves, fittings, pressure‑containing equipment and other oil & gas hardware. Also used by purchasers and specifiers who need to confirm a seal manufacturer’s qualification for use in API‑referenced equipment.

Related standards

Commonly referenced or complementary documents include API product standards that require polymeric seals, API Q1 (quality management requirements), API 20D (nondestructive examination), ISO/IEC 17025 (laboratory competence), ISO 2230 (storage of rubber products), SAE/AMS specifications for packaging/identification of seals, and other API 20 series supply‑chain qualification standards (for example API 20J, 20M, 20S, etc.).

Keywords

API 20L, polymeric seal, nonmetallic seal, seal manufacturer qualification, elastomer, thermoplastic, thermoset, traceability, inspection, oil and gas, supply chain qualification, quality management, MOC

FAQ

Q: What is this standard?

A: API STD 20L (2018) is an API standard that specifies qualification and quality requirements for manufacturers of polymeric (nonmetallic) seals used in petroleum and natural gas equipment.

Q: What does it cover?

A: It covers manufacturer qualification, process control, control of outsourced processes and materials, inspection and testing, identification and traceability, nonconforming product control, packaging/storage/handling, management of change, and records/document control for polymeric seal manufacture.

Q: Who typically uses it?

A: Seal manufacturers, QA/QC and production engineers, procurement and supply‑chain teams, OEMs and operators, and any purchaser or specifier requiring documented qualification of polymeric seal suppliers for oil & gas equipment.

Q: Is it current or superseded?

A: The 2018 first edition has been superseded. API published a second edition (API STD 20L, 2nd edition) in September 2025; the 2025 edition is the current version as of February 19, 2026.

Q: Is it part of a series?

A: Yes. API STD 20L is part of the API 20x family of supply‑chain and supplier qualification standards addressing services and suppliers for equipment used in the petroleum and natural gas industries (examples: API 20D, 20H, 20J, 20M, 20S, etc.).

Q: What are the key keywords?

A: Polymeric seal, nonmetallic seal, manufacturer qualification, traceability, inspection, elastomer, thermoplastic, thermoset, supply chain, API 20L.