HX; pipe 4 inch seamless SCH 40

Naval Sea Systems Command seeks 771 linear feet of 4-inch seamless Schedule 40 stainless steel pipe (MIL-P-24691 Type 1, dual certified to 316/316L material, NSN 1H 4710-01-626-8445 X2), with proposals due May 27, 2026 at 8:00 AM ET. This is a total small business set-aside under NAICS 331210, with a 1,000-employee size standard.

Place of performance is Portsmouth Naval Shipyard, Kittery, Maine. Requested delivery is 50 weeks after receipt of order with F.O.B. Destination pricing; freight costs are included in pricing. The contract specifies 9,252 inches of pipe manufactured per MIL-P-24691 with dual certification to 316/316L stainless steel, part number M24691/3P32K040 (MOD). Cobalt content is restricted to a maximum of 0.2%, with concentrations up to 0.5% permissible only upon waiver request with documented justification.

Manufacturing must comply with Military Specification MIL-P-24691 and include 100% thickness inspection via ultrasonic testing per MIL-DTL-24691 and NAVSEA Technical Publication T9074-AS-GIB-010/211. Vendors must notify the purchasing agent four weeks in advance to permit Portsmouth Naval Shipyard personnel to witness ultrasonic testing. Government inspection is mandatory during manufacture and prior to shipment, coordinated through Portsmouth Naval Shipyard. Material certification for all tests and inspections per applicable specifications, plus ASTM A312 product analysis, is required. Preservation and packaging follow ASTM D3951 standards with shipment in wooden boxes of 2-inch thick planks banded with metal straps.

Evaluation uses Lowest Price Technically Acceptable (LPTA) criteria encompassing technical capability, delivery schedule, price, and past performance. Offerors must provide technically acceptable Non-Destructive Testing procedures (Ultrasonic Testing and Liquid Penetrant Test per MIL-STD-2132D) and evidence of compliance with higher-level contracting quality requirements (MIL-I-45208 or ISO 9001/9002 with applicable STR-ISO 9000 Supplement). Vendors must submit three previous relevant projects completed within the last five years. Payment options include WAWF or Government Commercial Purchase Card (up to $100,000). All vendors must be registered in SAM. Offers are submitted via email to Ina Nason at ina.nason.civ@us.navy.mil.