This specification defines the minimum requirements for the design, materials, fabrication, assembly, testing, painting, and inspection of the Pig Receivers that are to be installed for the offshore platforms.

Supplier should supply all piping, fittings, flanges, and closures for the receivers.


This section outlines the referenced standards, specifications, and drawings to be used in the design and fabrication of the receivers.

2.1 Codes and Standards

The applicable sections of the current editions of the codes, standards and specifications (including revisions, addenda, and other documents incorporated by reference) should be considered a part of this specification.  Supplier should design, fabricate, and test the equipment in accordance with the latest editions of the standards and codes referenced below.

2.2 Industry Codes and Standards

  • ASME B16.5, “Pipe Flanges and Flanged Fittings”
  • MSS SP-44, “Steel Pipeline Flanges”
  • ASME B31.3, “Process Piping”.
  • Occupational Safety and Health Act (OSHA) Standards


All components of the receivers should be new, in first class conditions, designed for a 20 year life, and suitable for the intended service.

Supplier’s scope of supply includes all pig receivers and components, structural skids, and lifting materials required for a single-point lift of the skids.

Supplier scope of supply should include spare seals/gaskets/o-rings for closure.

Supplier scope of work includes design, procurement, fabrication, coating, inspection and testing, shipping preparation and preservation of the pig receiver, including the barrels, closure, nozzle connections, and supports as detailed in this specification.

The detailed design of the Pig Receiver skids should be the total responsibility of the Supplier. Supplier should submit for approval Supplier data prior to procurement of materials and the start of fabrication. No fabrication should commence until Owner Company or their representatives has reviewed and approved the approval drawings and other data.  Approval of drawings and data does not relieve the Supplier of compliance with codes, specifications, or from providing functional Pig Receivers.

Supplier should provide a milestone schedule with their bid and a level III schedule within two weeks of award.  Owner Company’s representatives should be advised of any schedule changes that will affect the skid’s delivery.

Supplier should provide a weekly progress report until the skid has been shipped. This report should include updated costs, schedule, and accomplishments of the previous week, and the plan for the following week.


The Pig Receivers should meet all accepted engineering standards and must be designed to conform to rules and regulations of the concerned regulatory bodies and the codes and standards listed above.

The Pig Receivers are designed for receiving pigs in hydrocarbon service and are used for pipeline maintenance and piping inspection through the use of intelligent pigs, scraper pigs, and poly pigs.

The Pig Receivers should be designed in accordance with this specification. Except for as superseded by the following requirements:

  • Barrel lengths and nozzle quantities, sizes and locations should be in accordance with the dimensions specified in this datasheet.
  • Pig signal is not required.
  • Pig pulling cable is not required.
  • Hydraulic actuator is not required for closure.

Pig Receiver closures should be Sypris Tube-Turn Double Bolt Yoke-style Horizontal Closure. Closures should be in accordance with the datasheets.

Pig Receiver closure should comply with ASME BVPC Section VIII - DIVISION 1.

Breakout flanges, with applicable size and rating, should be installed between the closure and receiver as indicated in the datasheets.

Pig Receiver should be rated for ASME (RF WN) and corrosion allowance in accordance with ASME B31.3, latest edition.  The Receiver will also be designed for an MDMT of -20 °F.


It is the intent of this specification that the pig receivers be completely confined within the boundaries of and mounted upon structural steel skids designed for single point lifting. Supplier should ensure all nozzle connections are completely within skid boundaries in order to provide spill containment.

Supplier should ensure that the skid has spill containment equal to the full volume of the corresponding pig receiver. Supplier should provide calculation to confirm.

The skid should be designed to be lifted from four points using a single point lift.  Alternately, Supplier may supply a spreader frame.  Supplier should plan for material-handling and load out accordingly.

No piping or skid components should interfere with the installation or removal of lifting gear, slings, shackles, etc.

The skid should be designed with drain connections in accordance with industry standards.

Supplier should submit for approval detailed skid structural calculations and fabrication drawings.

Skid should be installed on structural members. Owner Company should provide a layout drawing showing steel members.


The Pig Receivers should be painted in accordance with Owner Company’s specification or industry standard.


Supplier should submit weld procedures and testing procedures for approval prior to the start of fabrication.

Supplier should perform all piping visual, NDT and hydrostatic testing.  The testing procedure should be proposed and submitted by Supplier for approval.  The equipment should be inspected in accordance with Inspection Requirements Matrix.

Supplier should hydrotest to 1.5 times rated design pressure for four hours after all leaks are found.  Supplier should utilize a chart recorder for all testing and provide a copy in the final data books.  Supplier should calibrate the chart recorder with a certified deadweight test and use calibration paper for the hydrotest.

Supplier should perform 100% radiograph of all welds.

Owner Company will inspect the material and workmanship of all aspects of the job.  All work not found in conformance with these specifications should be rejected and replaced or redone at the Supplier's sole expense to the satisfaction of Owner Company.

No pressure parts or structural framing should be painted until inspection is completed.

The Supplier should furnish the Inspector with all mill certificates for all materials used for fabricating the Pig Receivers.  The Supplier should not carry out any work on these materials without the mill certificates being in its possession.

The Supplier should submit a detailed testing procedure and checklist for approval ten days prior to testing.

Inspection hold points and details should be in accordance with the RFQ package requirements.

Pig receiver should be inspected and tested in accordance with the inspection requirements included with RFQ.


Supplier should comply with all the preservation and preparation for shipment requirements.


Supplier data should be supplied in accordance with the Supplier data matrix included in the RFQ package.


Datasheet (to be provided per project requirement).