Liquid Penetrant Inspection
Our liquid penetrant inspection (LPI/PT) service evaluates suitable nonporous parts for discontinuities open to the surface. A penetrant process makes accessible surface indications visible for evaluation under the applicable procedure.
Provide the material, surface condition, required method, governing specification, and acceptance criteria. Preparation and inspection sequencing matter; penetrant inspection does not establish that a part is free of internal defects or verify coating adhesion.
Request a liquid penetrant inspection quote with your drawings and requirements.
Magnetic Particle Inspection
Our magnetic particle inspection (MPI/MT) service evaluates suitable ferromagnetic components for surface and near-surface discontinuities. Material, geometry, access, and the required inspection technique determine whether the method is appropriate.
Supply the alloy, part dimensions, inspection specification, acceptance criteria, and documentation needs. Discuss any preparation or subsequent finishing so the inspection is performed at the required stage.
Request an MPI quote, or read our guide to NDT for manufactured metal parts.
NDT services: questions before you order
Which NDT services does Sub Source list?
Sub Source lists liquid penetrant inspection, magnetic particle inspection, and Nital Etch (Temper Etch) among its inspection capabilities. Send the requested method and specification for review before placing an order. General descriptions of other NDT methods should not be taken as confirmation that those services are available.
How do I choose between penetrant and magnetic particle inspection?
The required method should follow the material, part requirements, and governing specification. Penetrant inspection evaluates accessible surface-breaking discontinuities in suitable nonporous materials. Magnetic particle inspection is used on suitable ferromagnetic materials for surface and near-surface discontinuities. Ask your engineering or quality team to clarify the requirement if it is not defined on the drawing.
When should inspection occur relative to finishing?
Use the sequence required by the manufacturing plan and inspection specification. Surface condition, cleaning, preparation, and coating can affect inspection access and suitability. Provide the full processing requirements so inspection and finishing can be coordinated.
What accreditation information should I confirm?
Sub Source publishes its NADCAP and ISO information on the Approvals page. Review the current documents and confirm that the specific process and customer requirements for your order are covered. Accreditation is not a blanket guarantee for every method or application.
What information is needed for an NDT quote?
Provide drawings and revision levels, material and alloy, dimensions and weight, quantity, required inspection method, specification and revision, acceptance criteria, incoming condition, reporting needs, and requested delivery date. Identify any customer approval requirements.
Can inspection be combined with other processing?
Sub Source also provides metal preparation, finishing, and coating services. Share the complete process sequence and required inspection points when requesting a quote. Confirm location and scheduling requirements directly with the team for your order.
Review our approvals and certifications, explore related metal finishing services, or send an NDT quote request. You can also contact the team at 815-968-7800.
