Grayloc® Closure Systems
Providing easy, quick, and safe access.
Our Closure Systems provide simpler and faster access to pressure vessels and other pressurized equipment by combining our Grayloc Clamp Connector with clamp supports and a hinged door. Suitable for use in extreme temperatures and pressures, the customizable systems can be oriented vertically or horizontally to meet your operational needs.
Well-suited for large diameter applications
Enable safe, rapid, and frequent access
Eliminate fugitive emissions
Technical Specifications
| Nominal pipe size | 6 to 36 in, larger sizes available upon request | |
| Design pressure rating | From full vacuum up to 60,000 psig | |
| Design temperature range | -423 to 1700°F / -253 to 927°C |
| Hub | Nickel alloys, carbon, low-alloy, stainless and duplex stainless steels |
| Seal Ring | Nickel alloys, low-alloy, stainless and duplex stainless steels |
| Bolting | Nickel alloys, carbon, low-alloy, stainless and duplex stainless steels |
| Trunnion | Nickel alloys, carbon, low-alloy, stainless and duplex stainless steels |
| Support plate | Nickel alloys, carbon, low-alloy, stainless and duplex stainless steels |
| Drive screw | Nickel alloys, low-alloy, stainless and duplex stainless steels |
| Hinge pin | Nickel alloys, carbon, low-alloy, stainless and duplex stainless steels |
| ASME B31.1, Power Piping |
| ASME B31.3, Process Piping |
| ASME B31.4, Pipeline Transportation Systems for Liquids and Slurries |
| ASME B31.8, Gas Transmission and Distribution Piping |
| ASME B31.12, Hydrogen Piping & Pipelines |
| ASME Section I |
| ASME Section VIII Div. 1 |
| ASME Section VIII Div. 2 |
| ASME Section VIII Div. 3 |
| API 6A: Specification for Wellhead and Christmas Tree Equipment |
Product Documents
Optional Features
Our self-contained, ready-to-install closure assemblies can be customized to meet your project and access requirements.
Typical Applications
- Simplifies access to food processing vessels, including those used in supercritical applications
- Provides easy, safe access in hazardous environments including fueling applications
- Increases safety with fully automated, remotely operated opening and closing
- Provides a customizable solution for integration into original equipment manufacturer designs
- Provides safe access to pressure equipment requiring frequent internal access for cleaning or product removal
- Ideal for use in areas where external lifting options and access are limited
- Supports easy and quick launching and recovery of pipeline pigs
- Enables simplified access and exceptionally quick opening and closing
- Provides easy and quick access to vessels and other equipment with fewer personnel and no external lifting requirements
- Enables safe, frequent access to vessels that require regular cleaning
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