S 38.011 Spectacle Blind | DEP & MESC Class 150–2500
S 38.011 spectacle blinds are line-isolation components used between ASME flange connections in piping systems where project documentation specifies Shell Standard Drawing and MESC requirements.
We manufacture spectacle blinds against customer-specified project documents, including S-38.011-001 / S-38.011-002, applicable MESC SPE requirements, ASME flange standards and the material specifications stated in the purchase order.
Typical pressure classes include ASME Class 150, 300, 600, 900, 1500 and 2500.
Shell S 38.011 Spectacle Blind Overview
| Item | Typical Requirement |
|---|---|
| Product | Spectacle Blind / Figure-8 Blind |
| Project Drawing | S-38.011-001 / S-38.011-002 as specified |
| Base Line Blank Standard | ASME B16.48 where applicable |
| Shell / MESC Requirement | MESC SPE 76/012 where specified |
| Carbon Steel Plate Requirement | MESC SPE 76/220 where applicable |
| Matching Flange System | ASME B16.5 |
| Pressure Classes | 150, 300, 600, 900, 1500, 2500 |
| Material | According to Purchase Order / MESC Buying Description |
| Certification | According to project requirements |
The exact drawing revision, material grade, inspection level and supplementary requirements should always be confirmed from the project purchase documentation.
What Is a Shell S 38.011 Spectacle Blind?
A spectacle blind, also known as a figure-8 blind, combines a solid blind section and an open spacer section in one component.
The component can be rotated between two operating positions:
- Blind position – blocks flow through the piping connection
- Open position – allows flow while maintaining the required spacing between flanges
This configuration provides a clear visual indication of the line-isolation condition.
For projects referencing Shell S 38.011, the spectacle blind should be manufactured according to the applicable customer-provided drawing and associated piping specifications.
S-38.011-001 / S-38.011-002
Project specifications may reference S-38.011-001 or S-38.011-002 for spectacle blinds used with ASME flange systems.
These drawing references should be read together with the complete purchase documentation rather than treated as stand-alone material specifications.
A typical project document package may include:
| Document | Purpose |
|---|---|
| S-38.011-001 / S-38.011-002 | Project spectacle blind drawing reference |
| ASME B16.48 | General line blank requirements where specified |
| ASME B16.5 | Matching flange dimensions and pressure class |
| MESC SPE 76/012 | Additional project requirements where specified |
| MESC SPE 76/220 | Material-specific requirements for applicable carbon steel plate |
| MESC Buying Description | Product, material and project-specific purchasing requirements |
The latest applicable revision should be taken from the purchase order, requisition or customer-controlled project documentation.
MESC SPE 76/012
Where specified by the project, MESC SPE 76/012 may introduce additional requirements for spectacle blinds, spades and spacers used within the applicable piping system.
These requirements may address areas such as:
- Product configuration
- Material selection
- Manufacturing
- Surface condition
- Inspection
- Identification
- Traceability
- Certification
The detailed requirements should be controlled by the customer-provided specification and applicable project documentation.
For quotation and manufacturing review, the relevant MESC Buying Description and specification revision should therefore be provided together with the RFQ whenever available.
MESC SPE 76/220
For spectacle blinds manufactured from applicable ASTM A516 carbon steel plate, project documentation may additionally reference MESC SPE 76/220.
This specification may introduce supplementary material requirements beyond the base ASTM material specification.
Applicable carbon steel plate grades can include:
- ASTM A516 Grade 60
- ASTM A516 Grade 65
- ASTM A516 Grade 70
The exact grade and supplementary requirements must follow the purchase order.
MESC SPE 76/220 should not automatically be applied to stainless steel, duplex stainless steel or nickel-alloy spectacle blinds unless specifically required by the project documentation.
ASME Class 150–2500 Spectacle Blinds
Shell S 38.011 spectacle blinds can be manufactured for common ASME flange pressure classes including:
- Class 150
- Class 300
- Class 600
- Class 900
- Class 1500
- Class 2500
Dimensions and thickness vary according to:
- Nominal pipe size
- Pressure class
- Material
- Matching flange configuration
- Project drawing
- Design requirements
The required dimensions should therefore be verified against the applicable project drawing rather than selected only from a generic spectacle blind table.
Spectacle Blinds for RF Flange Connections
Many project inquiries describe the product as:
Spectacle Blind RF or Spectacle Blind for Raised Face Flanges
This normally indicates that the spectacle blind is intended for installation between ASME raised-face flange connections.
The required gasket seating surface, finish and compatibility should follow the applicable flange standard and project specification.
Typical inquiry description:
Spectacle Blind, S 38.011, NPS 8″, Class 600, ASTM A516 Gr.70, for ASME B16.5 RF Flanges
Material Options
Depending on the project piping class, spectacle blinds can be supplied in different materials.
Carbon Steel
Typical options include:
- ASTM A516 Grade 60
- ASTM A516 Grade 65
- ASTM A516 Grade 70
- Other project-specified carbon steel plate
Stainless Steel
Available grades may include:
- 304 / 304L
- 316 / 316L
- 316Ti
- 321
- 347
Duplex and Super Duplex
Typical grades include:
- UNS S31803
- UNS S32205
- UNS S32750
- UNS S32760
Nickel Alloys
Project-specific options can include:
- UNS N06625
- UNS N08825
- UNS N10276
- Other specified corrosion-resistant alloys
Material availability and specification compliance should be confirmed against the applicable project requirements.
Shell S 38.011 vs ASME B16.48
Shell S 38.011 and ASME B16.48 should not be treated as identical references.
| Item | Shell S 38.011 Project Requirement | ASME B16.48 |
|---|---|---|
| Application | Project-specific | General industry standard |
| Product | Spectacle Blind | Line Blanks |
| Project Drawing | S-38.011 series | ASME standard dimensions |
| Material Selection | Purchase Order / MESC requirements | Specified by applicable material requirement |
| Additional Requirements | May apply | Purchaser supplements may apply |
For Shell-related project inquiries, compliance should be reviewed against the complete project document set rather than against ASME B16.48 alone.
Spectacle Blind, Spade and Spacer
Shell project documentation may use separate drawing references for different line-isolation products.
Typical product categories include:
- Spectacle Blind
- Spade / Paddle Blind
- Spacer / Paddle Spacer
These components perform similar isolation functions but differ in construction and operating method.
The exact product type should be confirmed from the piping material specification and purchase description.
Inspection and Certification
Depending on the purchase specification, available inspection and documentation can include:
- EN 10204 Type 3.1 Material Certificate
- Chemical Analysis
- Mechanical Test Results
- Dimensional Inspection
- Visual Inspection
- Material Identification
- PMI when specified
- Surface Inspection
- Traceability Records
- Third-Party Inspection
- Project-Specific Documentation
Additional testing can be arranged where specifically required by the purchase order.
How to Order S 38.011 Spectacle Blinds
Example 1
Spectacle Blind, S 38.011, NPS 10″, Class 600, ASTM A516 Gr.70, for ASME B16.5 RF Flanges, project MESC requirements as specified
Example 2
BLD SPCT,A516.60,SOUR,CL150,DN50
Blinds, Line, Spectacle
Material CARBON STEEL LOW TEMP
Mat, spec ASTM A516 GRADE 60
ASTM A516 GRADE 65
ASTM A516 GRADE 70
Design spec ASME B16.48
Design spec, flange(s) ASME B16.5
Standard drawing DEP STD DRG S-38.011-001 2012
DEP STD DRG S-38.011-002 2012
Service(s) SOUR AND LOW TEMP
Mandatory requirements MESC SPE 74/125 2012
MESC SPE 74/125 2017
MESC SPE 76/012 2013
MESC SPE 76/012 2018
MESC SPE 76/220 2012
MESC SPE 76/220 2018
Frequently Asked Questions
What is S 38.011?
S 38.011 is a project drawing reference associated with spectacle blinds for ASME flange systems.
Is S 38.011 the same as ASME B16.48?
No. ASME B16.48 is a general industry standard for line blanks, while S 38.011 is used within a project-specific documentation system that may include additional MESC and purchasing requirements.
What is MESC SPE 76/012?
MESC SPE 76/012 may be specified as part of the project requirements for spectacle blinds, spades and spacers. The applicable revision and detailed requirements should be taken from customer-controlled project documentation.
What is MESC SPE 76/220?
MESC SPE 76/220 may apply where specified carbon steel plate such as ASTM A516 is used. Its applicability should be confirmed from the purchase order or MESC Buying Description.
Can S 38.011 spectacle blinds be supplied in stainless steel or duplex?
Yes, subject to the project material specification. Stainless steel, duplex, super duplex and nickel-alloy spectacle blinds can be supplied when specified.
Which pressure classes are available?
Typical supply includes ASME Class 150, 300, 600, 900, 1500 and 2500, subject to size, material and project requirements.
S 38.011 Spectacle Blind MESC SPE 76
S 38.011 Spectacle Blind Manufacturer and Supplier
We manufacture and supply spectacle blinds against customer-specified S-38.011-001 / S-38.011-002, MESC, ASME and project piping requirements.
Available products include carbon steel, stainless steel, duplex, super duplex and nickel-alloy spectacle blinds for ASME Class 150 through Class 2500 applications.
Manufacturing is based on the applicable customer-provided drawing, purchase specification and project documentation.
For quotation, please provide the drawing reference and revision, size, pressure class, material, flange facing, quantity, certification and inspection requirements.
