OCTG Products

Forever Steel supplies OCTG casing and tubing for oilfield drilling, well construction, production, injection and workover projects. Before quotation, buyers should confirm the product role, well section, grade/type, size, nominal weight, connection, service environment, design loads, drift requirement, inspection scope, documentation package and delivery sequence.

Use the product function first. Do not treat every oilfield tubular as an API 5CT product.

Choose casing when the primary requirement is wellbore support, formation isolation, cementing or pressure containment. Choose tubing when the primary requirement is a replaceable production, injection or workover flow path inside the casing string. Final string design remains the responsibility of the operator, EPC or qualified well engineer.

API 5CT Casing Pipe | API 5CT Tubing Pipe | Casing String Application Guide

The following supply matrix preserves the existing product scope while separating the buyer fields that must be confirmed for each item.

Indicative Length Ranges

The purchase order should identify the exact edition of API Spec 5CT, applicable addenda or errata, API Spec 5B requirements for standard threads and gauging, and any purchaser or project supplements. ISO 11960 may also be referenced where contractually applicable.

· General project requirements commonly include J55, K55 and N80 types.

· Higher-strength requirements may include P110 or Q125, subject to design and manufacturing-route confirmation.

· Service-specific grades/types may include L80, C90, T95 or C110; the grade name alone does not confirm suitability for a defined H2S-containing environment.

· Where H2S is present, evaluate the actual environment and material qualification against the applicable project requirements and ISO 15156/NACE MR0175 basis.

· Do not automatically use legacy PSL-1/PSL-2 wording as a universal field for a new order. The current standard edition and purchase order control the requirement set.

API connections include STC, LTC and BTC for casing and NUE/EUE for tubing. Thread form, gauging, coupling condition, make-up requirements and thread protection should be confirmed for the ordered product.

Premium connections should be identified by exact design, licensed source and qualification basis. Sealability, tension, compression, bending and combined-load performance are connection-specific and must be checked against the project operating envelope; a generic 'gas-tight' claim is not sufficient.

For connection selection boundaries, see Standard API Threads or Premium Connections.

· External protection may include clear varnish, black painting or an agreed temporary corrosion-preventive oil.

· Internal coating or lining may be specified for a defined fluid, temperature and operating condition to address friction, deposition or corrosion-control objectives.

· Coating does not replace material qualification, corrosion assessment or ISO 15156 review where H2S is present.

· Storage inhibitors, dry storage, protected ends and documented preservation periods should be agreed where extended storage is expected.

Forever Steel supports confirmed OCTG requirements for onshore and offshore wells, unconventional reservoirs, geothermal projects, injection service, workover programs and carbon-storage wells. Product selection remains project-specific and must reflect the well design, pressure and temperature envelope, fluid chemistry, expected loads and required service life.

Inspection and release requirements should be agreed before production or stock allocation. The applicable scope depends on the product, grade/type, manufacturing route, connection, governing standard and purchase order; it should not be reduced to a generic '100% NDT' statement.

A project document package may include the MTC, dimensional report, drift record, hydrostatic and applicable NDT records, thread-gauging results, marking and tally lists, packing/loading evidence, and approved NCR or concession closeout. Third-party inspection and witness/hold points should be stated in the ITP before release.

Certificate wording  EN 10204 3.1 documentation, ITP/MPS submission and third-party inspection should be stated as available subject to the confirmed manufacturing route, contract and purchase-order scope - not as automatic inclusions for every order.

Use the API 5CT Pre-Shipment Inspection Guide to prepare thread-gauging, drift, hydrotest, NDT, tally and release checkpoints.

Packaging and lifting methods should be agreed for the actual pipe size, connection and transport route. Typical controls include:

· Bundles or loose loading arranged to suit pipe OD, mass, end type and carrier requirements.

· Thread protectors installed and verified before dispatch; lifting contact kept clear of machined ends.

· Timber dunnage, rubber-padded contact points and suitable separation to reduce steel-on-steel damage.

· Sea-worthy lashing or container blocking designed to limit movement during maritime transport.

· Tally lists, bundle marks, packing records and loading photographs matched to the shipment release package.

· Third-party inspection by SGS, BV, TUV or another agreed body when included in the approved ITP and purchase order.

For comparable quotations, provide the following information:

1. Product role and application: casing, tubing, coupling, pup joint or crossover; identify the well section or service function.

2. Governing standard: exact API Spec 5CT edition, applicable addenda/errata, API Spec 5B requirements and project supplements.

3. Dimensions and quantity: OD, nominal weight, wall/ID/drift requirement, length range, joint count or total quantity.

4. Grade/type and manufacturing route: include delivery condition and any heat-treatment or supplementary requirement.

5. Connection package: STC, LTC, BTC, NUE, EUE or exact premium design; confirm couplings, pin/box arrangement and thread protectors.

6. Service environment and design basis: pressure, temperature, collapse, burst, tension, combined loads, fluid chemistry, CO2/H2S and corrosion controls.

7. Inspection plan: dimensional and drift checks, hydrostatic testing, applicable NDT, thread gauging, end-area inspection, witness/hold points and acceptance criteria.

8. Document package: MTC, ITP/MPS, inspection reports, tally, marking, packing/loading evidence and TPI release records where required.

9. Commercial and delivery scope: delivery destination, Incoterm, packaging, shipment sequence, required date and any source/brand approval constraints.

For a full selection and purchase-order checklist, open the API 5CT Casing and Tubing Complete Guide.

Use these manually selected OCTG resources instead of unrelated automatic news items:

API 5CT Casing and Tubing Complete Guide - Main selection, inspection and RFQ guide

When Do Projects Need Surface, Intermediate or Production Casing? - Casing-string application route

What Should Be Checked Before Ordering API 5CT Tubing? - Production, injection and corrosive-service checks

Standard API Threads or Premium Connections - STC, LTC, BTC, NUE, EUE and premium-connection boundaries

API 5CT Pre-Shipment Inspection - Thread gauging, drift, hydrotest, NDT and tally evidence

API 5CT Couplings, Pup Joints and Crossovers - Accessory and transition-item ordering requirements