Cementing Discharge Manifold

The Cementing Discharge Manifold routes high-pressure cement slurry from positive displacement pumps to the wellhead during oil and gas cementing operations. Engineered for high-pressure service up to 15,000 PSI, this assembly integrates forged alloy steel blocks, heavy-duty plug valves, and high-integrity swivel joints or hammer union connections.

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Product Introduction

Product Overview

Produced via in-house forging, CNC machining, and hydrostatic pressure testing, our manifolds integrate directly into skid-mounted or trailer-mounted cementing units. Every unit ships with full material traceability (MTRs) and API-compliant documentation to satisfy rig-site auditing and compliance standards.

Key Features

Structural Integrity: Solid-forged 4130/4140 low-alloy steel bodies eliminate internal casting voids, ensuring reliable containment under cyclic high-pressure pulses.

Erosion Resistance: Critical flow paths feature heat-treated internal profiles or wear-resistant segments to withstand abrasive solid-laden cement slurries.

Operational Stability: Precision plug valves and rigid manifold frames minimize vibration-induced fatigue during continuous high-rate pumping.

Field Maintainability: Modular bolted and union-connected architecture allows rapid replacement of individual valve components, swivel joints, or seal kits on location.

Technical Specifications

Specification	Standard Configuration	Options / Custom Range
Max Working Pressure	10,000 PSI / 15,000 PSI	5,000 PSI – 20,000 PSI
Nominal Size	2 inch / 3 inch	Up to 4 inch
Inlet / Outlet Connections	Fig 1502 Hammer Unions	API Flanged, Grayloc, Custom Adapters
Service Environment	Standard Service	H2S Sour Service (NACE MR0175 / ISO 15156)
Temperature Rating	-29°C to 121°C (-20°F to 250°F)	Extended cryogenic or high-temp options
Governing Standards	API Spec 16C / API Spec 6A	ASME Sec. VIII, DNV 2.7-1 (for offshore skids)

Applications

Primary & Remedial Cementing

Distributes cement slurries to surface casing, production casing, and liner strings under controlled pressure.

Cementing Unit Integration

Mounts directly on twin-pump or single-pump oilfield cementing skids and service trailers.

Pressure Integrity Testing

Functions as the primary fluid distribution manifold during casing, tubing, and wellhead pressure tests.

Materials & Configuration

Manifold Block / Cross: Solid-forged AISI 4130/4140 alloy steel, quenched and tempered. Hardness strictly controlled to $\le 22$ HRC for sour service compliance.

Valves: High-pressure plug valves equipped with tungsten carbide or nitrided segments to prevent slurry cutting and seat wear.

Swivel Joints: Ball-bearing mounted swivel joints featuring integral packing sets, accommodating piping misalignment without inducing bending stress.

External Coating: Blast-cleaned to Sa 2.5 and coated with a marine-grade epoxy primer and polyurethane finish to resist atmospheric corrosion in coastal or offshore environments.

Quality Control & Manufacturing Validation

Full manufacturing control is maintained from raw material forging to final assembly:

Material Verification: Positive Material Identification (PMI) and ultrasonic testing (UT) performed on all heavy-section forgings per ASTM standards.

Dimensional Inspection: CMM and laser scanning verify port alignment, bolt circle diameters, and union thread tolerances.

Hydrostatic Pressure Testing: Every assembled manifold undergoes shell and seat pressure testing at 1.5x rated working pressure for mandated holding durations per API 16C/6A protocols.

Documentation Package: Each shipment includes certified material test reports (EN 10204 3.1 MTRs), pressure test charts, and QA/QC inspection sign-offs.

Customization & OEM Integration

Dimensional Matching

Engineers can configure skid footprints, center-to-center port distances, and overall manifold geometry to fit existing equipment frames.

Port Configuration

Flexible arrangement of fluid inlets, bypass lines, pressure gauge taps, and relief valve ports.

Surface Certification

Custom paint specifications (NORSOK M-501 systems) and third-party witness inspection (DNV, BV, ABS) available upon request.

Packaging & Shipping

Thread & Seal Protection: All threaded connections, hammer union threads, and flanged faces are fitted with heavy-duty steel or high-impact plastic thread protectors and blind flanges.

Internal Preservation: Internal cavities are flushed, dried, and coated with water-displacing rust preventative oil, supplemented by desiccant bags within sealed packouts.

Transport Security: Securely bolted to ISPM 15-compliant heat-treated wooden saddles or steel transport frames to prevent shifting during containerized ocean freight or flatbed trucking.

Frequently Asked Questions

Q: Are your cementing manifolds certified to API standards?

A: Yes. Assemblies and constituent pressure-containing components are manufactured in accordance with API Spec 16C and API Spec 6A guidelines, utilizing licensed material grades and traceable manufacturing processes.

Q: Can these manifolds be used in sour gas ($\text{H}_2\text{S}$) environments?

A: Yes. For sour service applications, we select raw materials meeting strict chemical composition limits and hardness thresholds compliant with NACE MR0175 / ISO 15156.

Q: What is the standard lead time for a custom manifold configuration?

A: Standard configurations utilizing stocked forged blocks typically ship within 4 to 6 weeks. Complex custom skid integrations or third-party witness testing requirements generally take 8 to 10 weeks.

Q: How do you prevent thread and seal damage during transport?

A: All unions and flanges use machined metal or heavy-duty composite thread protectors. Open ports are sealed with O-ring plugs or bolted blind flanges to prevent moisture or debris ingress.

Q: What maintenance is required between cementing jobs?

A: After each job, flush the manifold thoroughly with clean water, inspect plug valve sealing performance, grease swivel joint ball races, and check hammer union seal rings for extrusion or cuts.

Q: What documentation is provided with the shipment?

A: A complete data book is supplied, including material test reports (MTRs 3.1), NDE inspection reports (UT/MT), hydrostatic pressure test certificates, and operation/maintenance manuals.