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ASME B133.10-1981 — Gas Turbine Information to be Supplied by User and Manufacturer
📐 ASME (ANSI) B133.10-1981, titled Procurement Standard for Gas Turbine Information to be Supplied by User and Manufacturer, is the communication hub of the ASME B133 gas turbine procurement standards series. Approved by the American National Standards Institute on December 8, 1981, and published by ASME on October 15, 1982, its purpose is deliberately narrow and practical: to create a fast and reliable channel of communication between the user, who issues requests for proposals, and the manufacturer, who tenders proposals. The Standard does not prescribe what performance a gas turbine must achieve. Instead, it supplies a set of prestructured forms that force all bidders to present their data in the same order, units, and level of detail, so that the user can compare competing proposals item by item on an equal basis.
💡 Because gas turbine projects are capital-intensive and technically complex, unstructured proposals are notoriously hard to compare. B133.10 institutionalizes comparability: each numbered item on the forms cross-references the corresponding technical requirements in the other B133 sections, making the whole series a self-consistent procurement document system.
1. Scope and Purpose 📌
The scope clause states the Standard’s core intent: rapid communication between user and manufacturer relative to requests for proposals and the tendering of proposals. Three design principles follow directly from this intent:
- Prestructured forms: the forms facilitate the preparation of the information and ensure consistency of submission by the various manufacturers who may be requested to submit proposals.
- Cross-referencing: the forms cross-reference the appropriate information contained in the other sections of the Gas Turbine Procurement Standard, so a single inquiry package ties the series together.
- Terminology discipline: definitions follow ASME B133.1, Gas Turbine Terminology, as expanded in the other technical sections — both parties must agree on the vocabulary before numbers mean the same thing to both.
The B133 family applies to open-cycle, closed-cycle, and semi-closed-cycle gas turbines with conventional combustion systems for industrial, marine, and electric power applications, together with the auxiliaries needed for proper operation. It deliberately excludes turbines in earth-moving machines, agricultural and industrial tractors, automobiles, trucks, buses, and aeropropulsion units, and requires modifications when applied to unconventional heat sources such as chemical processes, nuclear reactors, or supercharged-boiler furnaces.
⚠️ B133.10 is a voluntary procurement standard, not a mandatory code. The Standard expressly states that the user may add, delete, or modify its requirements in the user’s own procurement specification. However, once the forms are incorporated by reference into an inquiry or contract, they become binding on both parties — treat them as contract documents, not paperwork.
2. Structure and the G/M Marking System 🗂️
The body of the Standard has only five sections, with clear division of responsibility:
| Section | Supplied By | Principal Content | Applicability Mark |
|---|---|---|---|
| 1 — Scope | — | Intent, use of forms, terminology reference to B133.1 | Common |
| 2 — Information to be Supplied by the User | User | Application, gas turbine type, fuel(s), total power required, duty cycle, number of units, site conditions | Common |
| 3 — General Information to be Supplied by the Manufacturer | Manufacturer | Overall unit description, ratings and performance, structure and materials, auxiliaries, control and protection, maintenance, spares, scope of supply and documents | Common |
| 4 — Generator Information (where applicable) | Manufacturer | Generator parameters, excitation, bus connection, switchgear, grounding, electrical protection | G only |
| 5 — Mechanical Drive Interface Information (where applicable) | Manufacturer | Couplings, gearboxes, speed range, torque characteristics, shaft system critical speeds | M only |
The most practical feature of the Standard is the G and M margin marking. Items applicable only to generator-drive applications carry a G in the left-hand margin; items limited to mechanical-drive applications carry an M; unmarked items apply to both. A margin note states explicitly that only Section 4 or Section 5 will be used in a specific bid request — the two are mutually exclusive, preventing generator and mechanical-drive interface data from being mixed in one document.
3. Information to be Supplied by the User (Section 2) 📝
Section 2 is the user’s part of the dialogue and defines the boundary conditions the manufacturer must design to. Based on the item content detailed in the Standard, the user is expected to state at least:
- Application: electric power generation (system frequency 50 Hz or 60 Hz, system voltage) versus mechanical drive (pump, compressor, or other driver), with the applicable item marked G or M.
- Gas turbine type: simple cycle, regenerative, or heat-recovery cycle.
- Fuel(s): natural gas, distillate oil, crude oil, residual oil, or low-Btu gas (referencing ANSI B133.7), plus expected fuel quality variations.
- Total power required: in horsepower for mechanical-drive items or kilowatts for generator items, at a stated ambient temperature and pressure.
- Expected duty cycle: operating hours per year, starts per fired hour, and percentage of time at base load, peak load, and other load levels.
- Number of units desired: minimum and maximum quantities, so that bidders can optimize pricing and manufacturing.
The user is instructed to check only the items needed to make the evaluation, and may supplement Section 2 with additional information. The user also designates which items of Sections 3, 4, or 5 the manufacturer is required to complete.
💡 The “minimum necessary” principle is deliberate: it shortens the bidding cycle and keeps the evaluation focused on the parameters that actually drive the decision — availability, inspection intervals, spares support, control philosophy, emissions — instead of drowning the evaluator in boilerplate.
4. Engineering Practice Essentials 🛠️
- 🔍 Fix the application before choosing the section: generator drive (Section 4) and mechanical drive (Section 5) are mutually exclusive. For combined configurations (for example, marine COGAG/CODAG propulsion with auxiliary generation), state the interface boundaries for each duty in Section 2 and define how the two form sets are used.
- 🔧 Make the cross-references concrete: the items reference B133.1 (terminology), B133.2 (prime movers), B133.3 (auxiliary equipment), B133.4 (control and protection), B133.5 (electrical equipment), B133.6 (ratings and performance), B133.7 (fuels), B133.11 (transportation and installation), and B133.12 (maintenance and safety). Attach a section-to-item mapping table to the inquiry package.
- 📊 Standardize units and reference conditions: performance is only comparable under identical reference conditions (inlet temperature, pressure, humidity, fuel lower heating value, generator efficiency). Write these once in Section 2 so bidders cannot quote their own “standard conditions.”
- 📋 Build a bid evaluation matrix: convert each B133.10 item into a matrix row and require “compliant / deviation / not applicable” responses, with technical justification and price impact for every deviation.
- ⏱️ Control clarification rounds: prestructured forms generate many items and therefore many clarifications. Set a technical-clarification deadline and restrict clarifications to items appearing on the forms.
✅ Successful practice: split the B133.10 forms into a mandatory “core answer” tier (performance, interfaces, maintenance, scope of supply) and an optional “elaboration” tier that bidders may expand. This preserves standardized comparability while avoiding hundreds of pages of near-identical documents.
5. Relationship to the Other B133 Sections 🔗
B133.10 is often called the “entry document” of the series: nearly every technical requirement from the other sections must enter the contract through its forms. This explains a frequently overlooked statement in the Standard — the forms exist to ensure consistency of submission, not to judge the technical merits of the proposals. That judgment remains the user’s task, performed against the technical clauses of B133.2 through B133.8. Together with B133.11 (transportation and installation), B133.10 covers the entire pre-commissioning flow from inquiry to first fire; later, the maintenance plans, spares lists, training, and document requirements of B133.12 draw their data directly from the manufacturer’s Section 3 entries.
6. Frequently Asked Questions ❓
❓ Q: Is B133.10 a mandatory standard?
A: No. The B133 series consists of procurement guidance standards that users voluntarily invoke in their procurement specifications. The Standard explicitly allows the user to add, delete, or modify requirements. Once incorporated by reference into an inquiry or contract, however, its terms become binding on both parties.
A: No. The B133 series consists of procurement guidance standards that users voluntarily invoke in their procurement specifications. The Standard explicitly allows the user to add, delete, or modify requirements. Once incorporated by reference into an inquiry or contract, however, its terms become binding on both parties.
❓ Q: If I buy the gas turbine only, without a generator, do I still need Section 4?
A: No. Section 4 applies only to generator-drive applications (marked G) and Section 5 only to mechanical-drive applications (marked M); only one of the two is used in a given bid request. If the turbine and the generator come from different suppliers, state the interface responsibility split in Section 2.
A: No. Section 4 applies only to generator-drive applications (marked G) and Section 5 only to mechanical-drive applications (marked M); only one of the two is used in a given bid request. If the turbine and the generator come from different suppliers, state the interface responsibility split in Section 2.
❓ Q: What do the “prestructured forms” actually look like?
A: They are numbered itemized checklists: the left column holds the item number and G/M mark, the middle names the item and its meaning, and the right side leaves a blank for the value or a yes/no/deviation answer. The stable numbering is what makes cross-bidder comparison and follow-up clarification letters possible.
A: They are numbered itemized checklists: the left column holds the item number and G/M mark, the middle names the item and its meaning, and the right side leaves a blank for the value or a yes/no/deviation answer. The stable numbering is what makes cross-bidder comparison and follow-up clarification letters possible.
🔍 Q: How does B133.10 relate to the data-sheet appendices of later B133 parts?
A: Later parts (such as B133.16-2000) publish data sheets as mandatory appendices tailored to specific applications. B133.10-1981 provides the general framework; in practice, users take B133.10 as the master template and overlay application-specific data-sheet appendices to build a complete inquiry package.
A: Later parts (such as B133.16-2000) publish data sheets as mandatory appendices tailored to specific applications. B133.10-1981 provides the general framework; in practice, users take B133.10 as the master template and overlay application-specific data-sheet appendices to build a complete inquiry package.
