Api Spec 5b Manual

A brief introduction of API 5L, API 5B, API 5CT and API 5D. API standards are designed to qualify the oil and petrol industry according to the legislation and environment requirements. According to API, oil and natural gas industry can have the reference standards about its industry.Under the general standards, there are some subordinated specifications drafted for each specific OCTG product. We are pleased to announce the publications of the 10th edition of Specification 5CT, Casing and Tubing, and the 7th edition of Technical Report 5C3, Calculating Performance Properties of Pipe Used as Casing or Tubing. These new editions provide technical updates that have reached consensus within API’s Subcommittee on Tubular Goods and will now give industry consistent practices in the. API SPEC 5CT, 10th Edition, June 2018 - Casing and Tubing Coverage This standard specifies the technical delivery conditions for steel pipes (casing, tubing, and pup joints), coupling stock, coupling material, and accessory material, and establishes requirements for three product specification levels (PSL-1, PSL-2, and PSL-3).

The API 5B specification covers marking requirements and dimensions utilized by API Master thread gauges. The 5B specification is used when measuring pipe, tubing and casing threads, and each adheres to a specific set of guidelines. Various additional thread gauges and featured product threads are required when the API 5B specification is used. The following adhere to API 5B specifications:

Line pipe thread inspection
Buttress casing
Round thread casing
Extreme-line casing

API 5B Applications

API 5B specifications are applicable when API standards govern a product. Similarly, API 5B inspection procedures are used on threads featuring 11.5, or less, turns per inch. API 5B inspection procedures utilize the following measurements:

Taper
Lead
Height
Angle

Each thread dimension is measured and shown without included tolerances are considered connection design bases, and they’re not related, nor subjected to, measurements utilized to determine a product’s acceptance or rejection. Each manufacturer and purchaser is required to agree upon supplemental requirements before using API 5B specifications.

API 5B Inspection

API 5B specification thread inspection is used prior to shipment events. Manufacturers frequently measure a thread’s various intermediate points, and they inspect each again during destination delivery. Additionally, inspectors representing both the manufacturer and purchaser are required to inspect each 5B specification.

Manufacturers may utilize different methods and instruments to control manufacturing operations, and they may become flexible where specification application is required. However, acceptance or rejection of a product is entirely governed by an inspection’s results. This rule is often featured in accordance with a provided 5B specification listing, and is held in high regards during every inspection. Each API 5B specification requires consultation before implementation, and requirements must be provided by the manufacturer.